Data reporting method, data receiving method, and related apparatus

ABSTRACT

This application discloses a data reporting method, a data receiving method, and a related apparatus. In this application, a terminal device reports, to a network device, one group of information used to indicate scheduling bandwidth thresholds and/or scheduling MCS thresholds. Compared with directly reporting thresholds, in this application, fewer bits can be occupied, thereby reducing overheads.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is a continuation of International Application No.PCT/CN2018/115638, filed on Nov. 15, 2018, which claims priority toChinese Patent Application No. 201711149112.3, filed on Nov. 17, 2017,all of which are hereby incorporated by reference in their entireties.

TECHNICAL FIELD

The present disclosure relates generally to the communications field,and in particular, to a data reporting and receiving methods.

BACKGROUND

In an existing wireless communications network, fewer frequency bandsare available in frequency resources below 6 GHz. Consequently,increasing communication requirements cannot be met. On the contrary,there are a large quantity of available frequency bands in a frequencyrange above 6 GHz. In a next generation communications network (forexample, NR (new radio)), use of frequencies above 6 GHz as an operatingfrequency band is being considered. Therefore, the next generationcommunications network has a distinguishing feature of a high-frequencycommunications system, to easily achieve a higher throughput. However,compared with the existing wireless communications network, because thenext generation communications network operates in a frequency bandabove 6 GHz, the next generation communications network suffers frommore severe mid-radio frequency distortion, especially impact brought byPHase Noise (PHN).

To suppress phase noise, the next generation communications networkprovides a Phase Tracking Reference Signal (PTRS). A base stationdelivers one group of scheduling bandwidth thresholds and one group ofscheduling Modulating and Coding Scheme (MCS) thresholds to an userequipment(UE), determines a corresponding phase tracking referencesignal pattern based on scheduling information, the delivered group ofscheduling bandwidth thresholds equipment, and the delivered group ofscheduling MCS thresholds, and sends a PTRS to the UE based on thedetermined phase tracking reference signal pattern. Before deliveringthe group of scheduling bandwidth thresholds and the group of schedulingMCS thresholds to the UE, the base station may consider one group ofscheduling bandwidth threshold sets and/or one group of schedulingbandwidth modulation and coding scheme MCS (modulation and codingscheme, modulation and coding scheme) threshold sets that are reportedby the UE as suggested values. How to reduce overheads for reportingthresholds by UE is a problem urgently to be resolved.

SUMMARY

A technical problem to be resolved by embodiments of the presentdisclosure is to provide a data reporting method, a data receivingmethod, and a related device, to compress thresholds to be reported by aterminal device, thereby reducing a data amount of the thresholds to bereported by the terminal device, and reducing resource overheads forreporting the thresholds by the terminal device.

According to a first aspect, this application provides a data reportingmethod, including: determining, by a terminal device, at least onescheduling bandwidth threshold, where each scheduling bandwidththreshold is a natural number power of 2; obtaining, by the terminaldevice, at least one element based on the at least one schedulingbandwidth threshold, where each element is used to indicate one of theat least one scheduling bandwidth threshold; and sending, by theterminal device, the at least one element to a network device.

The at least one scheduling bandwidth threshold may different from eachother. A value of each scheduling bandwidth threshold may be 2⁰, 2¹, 2²,. . . , or the like. An element quantity of the at least one element mayequal to a scheduling bandwidth threshold quantity of the at least onescheduling bandwidth threshold, the at least one element is in aone-to-one correspondence in some embodiments with the at least onescheduling bandwidth threshold, and each element is used to indicate oneof the at least one scheduling bandwidth threshold. In one exampleembodiment, a first element in the at least one element is used toindicate a first scheduling bandwidth threshold, and a second element inthe at least one element is used to indicate a second schedulingbandwidth threshold. A value of an element may be less than a schedulingbandwidth threshold indicated by the element. For example, a value ofthe first element is less than the first scheduling bandwidth threshold,and a value of the second element is less than the second schedulingbandwidth threshold.

According to the foregoing descriptions, the scheduling bandwidththreshold reported by the terminal device to the network device is anatural number power of 2, so that a value range of the schedulingbandwidth threshold becomes smaller, and a quantity of schedulingbandwidth thresholds that can be selected by the terminal device isreduced. A reported scheduling bandwidth threshold is indicated by anelement in a data set. In this way, a value of an element actuallyreported by the terminal device is less than an original schedulingbandwidth threshold, thereby reducing an amount of data reported by theterminal device.

In a possible embodiment, a value of each element is a logarithm of thescheduling bandwidth threshold that may be represented as the element toa base 2.

In a possible embodiment, a value of the at least one schedulingbandwidth threshold is less than or equal to a maximum bandwidthsupported by the terminal device.

In one embodiment, each of the at least one scheduling bandwidththreshold is greater than a preset value.

According to a second embodiment, a data reporting apparatus isdisclosed that includes a determining unit, configured to determine atleast one scheduling bandwidth threshold, where each schedulingbandwidth threshold is a number power of 2; a generation unit,configured to obtain at least one element based on the at least onescheduling bandwidth threshold, where each element is used to indicateone of the at least one scheduling bandwidth threshold; and a sendingunit, configured to send the at least one element to a network device.

In a possible embodiment, a value of each element is a logarithm of theindicated scheduling bandwidth threshold to a base 2.

In a possible embodiment, a maximum scheduling bandwidth threshold inthe at least one scheduling bandwidth threshold is less than or equal toa maximum bandwidth supported by a terminal device.

In a possible embodiment, each of the at least one scheduling bandwidththreshold is greater than a preset value.

According to a third aspect, this application provides a data receivingmethod, the method includes receiving, by a network device, at least oneelement from a terminal device, where each element is used to indicateone scheduling bandwidth threshold; and obtaining, by the networkdevice, at least one scheduling bandwidth threshold based on the atleast one element, where each scheduling bandwidth threshold is anatural number power of 2.

In a possible embodiment, each scheduling bandwidth threshold is equalto a k^(th) power of 2, where k is a value of a corresponding element.

According to a fourth aspect, this application provides a data receivingapparatus, including a receiving unit, configured to receive at leastone element from a terminal device, where each element is used toindicate one scheduling bandwidth threshold and a generation unit,configured to obtain at least one scheduling bandwidth threshold basedon the at least one element, where each scheduling bandwidth thresholdis a natural number power of 2.

In a possible embodiment, each scheduling bandwidth threshold is equalto a k^(th) power of 2, where k is a value of a corresponding element.

According to a fifth aspect, this application provides a data reportingmethod, including determining, by a terminal device, at least onescheduling bandwidth threshold, where a maximum scheduling bandwidththreshold in the at least one scheduling bandwidth threshold is lessthan or equal to a maximum bandwidth supported by the terminal device;and sending, by the terminal device, the at least one schedulingbandwidth threshold to a network device.

According to a sixth aspect, this application provides a data reportingapparatus, including a determining unit, configured to determine atleast one scheduling bandwidth threshold, where a maximum schedulingbandwidth threshold in the at least one scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by a terminaldevice; and a sending unit, configured to send the at least onescheduling bandwidth threshold to a network device.

According to a seventh aspect, this application provides a datareporting method, including determining, by a terminal device, at leastone scheduling bandwidth threshold, where a minimum scheduling bandwidththreshold in the at least one scheduling bandwidth threshold is greaterthan a preset value obtaining, by the terminal device, at least oneelement based on the at least one scheduling bandwidth threshold, whereeach element is used to indicate one of the at least one schedulingbandwidth threshold; and sending, by the terminal device, the at leastone element to a network device.

According to an eighth aspect, this application provides a datareporting apparatus, including a determining unit, configured todetermine at least one scheduling bandwidth threshold, where a minimumscheduling bandwidth threshold in the at least one scheduling bandwidththreshold is greater than a preset value, a generation unit, configuredto obtain at least one element based on the at least one schedulingbandwidth threshold, where each element is used to indicate one of theat least one scheduling bandwidth threshold; and a sending unit,configured to send the at least one element to a network device.

In one embodiment, each scheduling bandwidth threshold is a naturalnumber power of 2.

In one embodiment, each scheduling bandwidth threshold is a product of anatural number power of 2, a natural number power of 3, and a naturalnumber power of 5.

According to a ninth aspect, this application provides a data reportingmethod, including:

determining, by a terminal device, at least one scheduling bandwidththreshold, where each scheduling bandwidth threshold is a product of anatural number power of 2, a natural number power of 3, and a naturalnumber power of 5; generating, by the terminal device, at least oneelement, where each element is used to indicate one of the at least onescheduling bandwidth threshold; and sending, by the terminal device, theat least one element to a network device.

In an embodiment, a waveform used by the terminal device is OrthogonalFrequency Division Multiplexing (OFDM)/Discrete Fourier Transform(DFT)-spread(S)-OFDM (DFT-S-OFDM).

In another embodiment, each scheduling bandwidth threshold is less thanor equal to a maximum bandwidth supported by the terminal device.

According to a tenth aspect, this application provides a data reportingapparatus, including: a determining unit, configured to determine atleast one scheduling bandwidth threshold, where each schedulingbandwidth threshold is a product of a natural number power of 2, anatural number power of 3, and a natural number power of 5; a generationunit, configured to obtain at least one element based on the at leastone scheduling bandwidth threshold, where each element is used toindicate one of the at least one scheduling bandwidth threshold; and asending unit, configured to send the at least one element to a networkdevice.

In an embodiment, a waveform used by the terminal device is DFT-S-OFDM.

In an embodiment, each scheduling bandwidth threshold is less than orequal to a maximum bandwidth supported by the terminal device.

According to an eleventh aspect, this application provides a datareceiving method, including receiving, by a network device, at least oneelement from a terminal device, where each element is used to indicateone scheduling bandwidth threshold; and obtaining, by the networkdevice, at least one scheduling bandwidth threshold based on the atleast one element, where each scheduling bandwidth threshold is aproduct of a natural number power of 2, a natural number power of 3, anda natural number power of 5.

According to a twelfth aspect, this application provides a datareceiving apparatus, including: a receiving unit, configured to receiveat least one element from a terminal device, where each element is usedto indicate one scheduling bandwidth threshold; and a generation unit,configured to obtain at least one scheduling bandwidth threshold basedon the at least one element, where each scheduling bandwidth thresholdis a product of a natural number power of 2, a natural number power of3, and a natural number power of 5.

In an embodiment, a waveform used by the terminal device is a DFT-S-OFDMwaveform.

According to a thirteenth aspect, this application provides a datareporting method, including: determining, by a terminal device, twoscheduling bandwidth thresholds, where a larger one of the twoscheduling bandwidth thresholds is less than a maximum bandwidthsupported by the terminal device; and sending, by the terminal device,the two scheduling bandwidth thresholds to a network device.

According to a fourteenth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine two scheduling bandwidth thresholds, where a larger one of thetwo scheduling bandwidth thresholds is less than a maximum bandwidthsupported by the terminal device; and a sending unit, configured to sendthe two scheduling bandwidth thresholds to a network device.

According to a fifteenth aspect, this application provides a datareporting method, including: a determining unit, configured to determineat least one scheduling bandwidth threshold associated with a firstsubcarrier spacing; and a sending unit, configured to send the at leastone scheduling bandwidth threshold associated with the first subcarrierspacing to a network device.

In an embodiment, the first subcarrier spacing is associated with twoscheduling bandwidth thresholds, and each scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by a terminaldevice.

According to a sixteenth aspect, this application provides a datareporting apparatus, including a determining unit, configured todetermine at least one scheduling bandwidth threshold associated with afirst subcarrier spacing; and a sending unit, configured to send the atleast one scheduling bandwidth threshold associated with the firstsubcarrier spacing to a network device.

In an embodiment, the first subcarrier spacing is associated with twoscheduling bandwidth thresholds, and each scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by a terminaldevice.

According to a seventeenth aspect, this application provides a datareceiving method, including receiving, by a network device from aterminal device, at least one scheduling bandwidth threshold associatedwith a first subcarrier spacing; and determining, by the network devicebased on a ratio relationship between the first subcarrier spacing and asecond subcarrier spacing, at least one scheduling bandwidth thresholdassociated with the second subcarrier spacing.

In an embodiment, the first subcarrier spacing is associated with twoscheduling bandwidth thresholds, and each scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by the terminaldevice.

According to an eighteenth aspect, this application provides a datareceiving apparatus, including: a receiving unit, configured to receive,from a terminal device, at least one scheduling bandwidth thresholdassociated with a first subcarrier spacing; and a generation unit,configured to determine, based on a ratio relationship between the firstsubcarrier spacing and a second subcarrier spacing, at least onescheduling bandwidth threshold associated with the second subcarrierspacing.

In an embodiment, the first subcarrier spacing is associated with twoscheduling bandwidth thresholds, and each scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by the terminaldevice.

According to a nineteenth aspect, this application provides a datareporting method, including: determining, by a terminal device, nscheduling bandwidth thresholds, where the n scheduling bandwidththresholds are ptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n),ptrsthRB₁<ptrsthRB₂< . . . <ptrsthRB_(n), and n is an integer greaterthan 1; and sending, by the terminal device, ptrsthRB₁,ptrsthRB₂−ptrsthRB₁, . . . , and ptrsthRB_(n)−ptrsthRB_(n-1) to anetwork device.

In a possible embodiment, n is equal to 2, and ptrsthRB₁ and ptrsthRB₂each are less than or equal to a maximum bandwidth supported by theterminal device.

According to a twentieth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine n scheduling bandwidth thresholds, where the n schedulingbandwidth thresholds are ptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n),ptrsthRB₁<ptrsthRB₂< . . . <ptrsthRB_(n), and n is an integer greaterthan 1; and a sending unit, configured to send ptrsthRB₁,ptrsthRB₂−ptrsthRB₁, . . . , and ptrsthRB_(n)−ptrsthRB_(n-1) to anetwork device.

In a possible embodiment, n is equal to 2, and ptrsthRB₁ and ptrsthRB₂each are less than or equal to a maximum bandwidth supported by aterminal device.

According to a twenty-first aspect, this application provides a datareceiving method, including: receiving, by a network device, n elementsfrom a terminal device, where n is an integer greater than 1, and valuesof the n elements are C₁, C₂, . . . , and C_(n); and generating, by thenetwork device, n scheduling bandwidth thresholds based on the nelements, where the n scheduling bandwidth thresholds are C₁, C₁+C₂, . .. , and C₁+C₂+ . . . +C_(n).

According to a twenty-second aspect, this application provides a datareceiving apparatus, including a receiving unit, configured to receive nelements from a terminal device, where n is an integer greater than 1,and values of the n elements are C₁, C₂, . . . , and C_(n); and ageneration unit, configured to generate n scheduling bandwidththresholds based on the n elements, where the n scheduling bandwidththresholds are C₁, C₁+C₂, . . . , and C₁+C₂+ . . . +C_(n).

According to a twenty-third aspect, this application provides a datareporting method, including:

determining, by a terminal device, n scheduling bandwidth thresholds,where the n scheduling bandwidth thresholds are ptrsthRB₁, ptrsthRB₂, .. . , and ptrsthRB_(n), n is an integer greater than 1, andptrsthRB₁<ptrsthRB₂< . . . <ptrsthRB_(n); and sending, by the terminaldevice, ptrsthRB₂−ptrsthRB₁, ptrsthRB₃−ptrsthRB₂, . . . ,ptrsthRB_(n)−ptrsthRB_(n-1), and ptrsthRB_(n) to a network device.

According to a twenty-fourth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine n scheduling bandwidth thresholds, where the n schedulingbandwidth thresholds are ptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n),n is an integer greater than 1, and ptrsthRB₁<ptrsthRB₂< . . .<ptrsthRB_(n); and a sending unit, configured to sendptrsthRB₂−ptrsthRB₁, ptrsthRB₃−ptrsthRB₂, . . . ,ptrsthRB_(n)−ptrsthRB_(n-1), and ptrsthRB_(n) to a network device.

According to a twenty-fifth aspect, this application provides a datareceiving method, including: receiving, by a network device, n elementsfrom a terminal device, where n is an integer greater than 1, and valuesof the n elements are C₁, C₂, . . . , and C_(n); and generating, by thenetwork device, n scheduling bandwidth thresholds based on the nelements, where the n scheduling bandwidth thresholds are C_(n)−C_(n-1),. . . , −C₂−C₁, C_(n)−C_(n-1)−, . . . , −C₂, . . . , C_(n)−C_(n-1), andC_(n).

According to a twenty-sixth aspect, this application provides a datareceiving apparatus, including: a receiving unit, configured to receiven elements from a terminal device, where n is an integer greater than 1,and values of the n elements are C₁, C₂, . . . , and C_(n); and ageneration unit, configured to generate n scheduling bandwidththresholds based on the n elements, where the n scheduling bandwidththresholds are C_(n)−C_(n-1)−, . . . , −C₂−C₁, C_(n)−C_(n-1)−, . . . ,−C₂, . . . , C_(n)−C_(n-1), and C_(n).

According to a twenty-seventh aspect, this application provides a datareporting method, including: determining, by a terminal device, at leastone scheduling MCS threshold, where each scheduling MCS threshold is aneven number; obtaining, by the terminal device, at least one element,where each element is used to indicate one of the at least onescheduling MCS threshold; and sending, by the terminal device, the atleast one element to a network device.

In a possible embodiment, each scheduling MCS threshold is greater thana preset value.

According to a twenty-eighth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine at least one scheduling MCS threshold, where each schedulingMCS threshold is an even number; a generation unit, configured to obtainat least one element based on the at least one scheduling MCS threshold,where each element is used to indicate one of the at least onescheduling MCS threshold; and a sending unit, configured to send the atleast one element to a network device.

In a possible embodiment, each scheduling MCS threshold is greater thana preset value.

According to a twenty-ninth aspect, this application provides a datareporting method, including: determining, by a terminal device, at leastone scheduling MCS threshold, where each scheduling MCS threshold is anodd number; obtaining, by the terminal device, at least one elementbased on the at least one scheduling MCS threshold, where each elementis used to indicate one of the at least one scheduling MCS threshold;and sending, by the terminal device, the at least one element to anetwork device.

According to a thirtieth aspect, this application provides a datareporting apparatus, including a determining unit, configured todetermine at least one scheduling MCS threshold, where each schedulingMCS threshold is an odd number a generation unit, configured to obtainor generate at least one element based on the at least one schedulingMCS threshold, where each element is used to indicate one of the atleast one scheduling MCS threshold; and a sending unit, configured tosend the at least one element to a network device.

In a possible embodiment, each scheduling MCS threshold is greater thana preset value.

According to a thirty-first aspect, this application provides a datareporting method, including a determining unit, configured to determineat least one scheduling MCS threshold, where each scheduling MCSthreshold is greater than a preset MCS threshold; a generation unit,configured to obtain at least one element based on the at least onescheduling MCS threshold, where each element is used to indicate one ofthe at least one scheduling MCS threshold; and a sending unit,configured to send the at least one element to a network device.

In a possible implementation, the data reporting method includes:determining, by a terminal device, at least one scheduling MCS thresholdassociated with an MCS table corresponding to a highest modulationscheme supported by the terminal device; and sending, by the terminaldevice to a network device, the at least one scheduling MCS thresholdassociated with the MCS table corresponding to the highest modulationscheme supported by the terminal device.

In a possible embodiment, the at least one scheduling MCS thresholdincludes three scheduling MCS thresholds, and a maximum scheduling MCSthreshold in the three scheduling MCS thresholds is less than or equalto 1 plus a maximum MCS index value directly corresponding to a coderate in the MCS table.

According to a thirty-second aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine at least one scheduling MCS threshold associated with an MCStable corresponding to a highest modulation scheme; and a sending unit,configured to send, to a network device, the at least one scheduling MCSthreshold associated with the MCS table corresponding to the highestmodulation scheme.

In a possible embodiment, the at least one scheduling MCS thresholdincludes three scheduling MCS thresholds, and a maximum scheduling MCSthreshold in the three scheduling MCS thresholds is less than or equalto 1 plus a maximum MCS index value directly corresponding to a coderate in the MCS table.

According to a thirty-third aspect, this application provides a datareporting method, including: determining, by a terminal device, mscheduling MCS thresholds, where the m scheduling MCS thresholds areptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m), m is an integergreater than 1, and ptrsthMCS₁<ptrsthMCS₂, . . . , <ptrsthMCS_(m); andsending, by the terminal device, ptrsthMCS₁, ptrsthMCS₂−ptrsthMCS_(m), .. . , and ptrsthMCS_(m)−ptrsthMCS_(m-1) to a network device.

According to a thirty-fourth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine m scheduling MCS thresholds, where the m scheduling MCSthresholds are ptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m), m isan integer greater than 1, and ptrsthMCS₁<ptrsthMCS₂, . . . ,<ptrsthMCS_(m); and a sending unit, configured to send ptrsthMCS₁,ptrsthMCS₂−ptrsthMCS₁, . . . , and ptrsthMCS_(m)−ptrsthMCS_(m-1) to anetwork device.

According to a thirty-fifth aspect, this application provides a datareceiving method, including: receiving, by a network device, m elementssent by a terminal device, where values of the m elements are D₁, D₂, .. . , and D_(m); and generating, by the network device, m scheduling MCSthresholds, where the m MCS thresholds are D₁, D₁+D₂, . . . , and D₁+D₂+. . . +D_(m-1)+D_(m).

According to a thirty-sixth aspect, this application provides a datareceiving apparatus, including: a receiving unit, configured to receivem elements sent by a terminal device, where values of the m elements areD₁, D₂, . . . , and D_(m); and a generation unit, configured to generatem scheduling MCS thresholds, where the m MCS thresholds are D₁, D₁+D₂, .. . , and D₁+D₂+ . . . +D_(m-1)+D_(m).

According to a thirty-seventh aspect, this application provides a datareporting method, including: determining, by a terminal device, mscheduling MCS thresholds, where the m scheduling MCS thresholds areptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m), m is an integergreater than 1, and ptrsthMCS₁, <ptrsthMCS₂, . . . , <ptrsthMCS_(m); andsending, by the terminal device, ptrsthMCS₂−ptrsthMCS₁,ptrsthMCS₃−ptrsthMCS₂, . . . , ptrsthMCS_(m)−ptrsthMCS_(m-1), andptrsthMCS_(m) to a network device.

According to a thirty-eighth aspect, this application provides a datareporting apparatus, including: a determining unit, configured todetermine m scheduling MCS thresholds, where the m scheduling MCSthresholds are ptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m), m isan integer greater than 1, and ptrsthMCS₁<ptrsthMCS₂, . . . ,<ptrsthMCS_(m); and a sending unit, configured to send ptrsthMCS₂ptrsthMCS₁, ptrsthMCS₃−ptrsthMCS₂, . . . ,ptrsthMCS_(m)−ptrsthMCS_(m-1), and ptrsthMCS_(m) to a network device.

According to a thirty-ninth aspect, this application provides datareceiving method, including: receiving, by a network device, m elementsfrom a terminal device, where values of the m elements are D₁, D₂, . . ., and D_(m); and generating, by the network device, m scheduling MCSthresholds, where the m scheduling MCS thresholds are D_(m)−D_(m-1)− . .. −D₂−D₁, D_(m)−D_(m-1)−, . . . −D₂, . . . D_(m)−D_(m-1), and D_(m).

According to a fortieth aspect, this application provides a datareceiving apparatus, including: a receiving unit, configured to receivem elements from a terminal device, where values of the m elements areD₁, D₂, . . . , and D_(m); and a generation unit, configured to generatem scheduling MCS thresholds, where the m scheduling MCS thresholds areD_(m)−D_(m-1)− . . . −D₂−D₁, D_(m)−D_(m-1)− . . . −D₂, . . .D_(m)−D_(m-1), and D_(m).

According to another aspect, an apparatus is provided. The apparatus hasa function of implementing behavior of the terminal device or thenetwork device in the foregoing methods. The function may be implementedby hardware, or may be implemented by hardware by executingcorresponding software. The hardware or the software includes one ormore modules corresponding to the foregoing function.

The apparatus includes a receiver, a transmitter, a memory, and aprocessor. The memory stores a set of program code, and the processor isconfigured to invoke the program code stored in the memory, to performthe methods according to the foregoing aspects.

BRIEF DESCRIPTION OF DRAWINGS

To describe the technical solutions in the embodiments or the backgroundof the present disclosure more clearly, the following describes theaccompanying drawings required for the embodiments or the background ofthe present disclosure.

FIG. 1a is a schematic architectural diagram of a communications systemaccording to an embodiment of the present disclosure;

FIG. 1b is a schematic diagram of a PTRS pattern according to anembodiment of the present disclosure;

FIG. 2 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 3 is another schematic flowchart of a data reporting methodaccording to an embodiment of the present disclosure;

FIG. 4 is another schematic flowchart of a data reporting methodaccording to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 6 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 7 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 8 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 9 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 10 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 11 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 12 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 13 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 14 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 15 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure;

FIG. 16 is a schematic structural diagram of an apparatus according toan embodiment of the present disclosure;

FIG. 17 is another schematic structural diagram of an apparatusaccording to an embodiment of the present disclosure;

FIG. 18 is another schematic structural diagram of an apparatusaccording to an embodiment of the present disclosure; and

FIG. 19 is another schematic structural diagram of an apparatusaccording to an embodiment of the present disclosure.

DESCRIPTION OF EMBODIMENTS

Embodiments of this application may be applied to a wirelesscommunications system. It should be noted that, the wirelesscommunications system mentioned in the embodiments of this applicationincludes but is not limited to a Narrow Band-Internet of Things (NB-IoT)system, a Global System for Mobile Communications (GSM), an EnhancedData rates for GSM Evolution (EDGE) system, a Wideband Code DivisionMultiple Access (WCDMA) system, a Code Division Multiple Access 2000CDMA2000) system, a Time Division-Synchronous Code Division MultipleAccess (TD-SCDMA) system, a Long Term Evolution (LTE) system, an NewRadio (NR) communications system, and three application scenarios of anext generation 5G mobile communications system, including EnhancedMobile BroadBand (eMBB), URLLC, and Massive Machine TypeCommunications(mMTC).

In the embodiments of this application, a terminal device includes butis not limited to a mobile station (MS), a mobile terminal device, amobile telephone, a handset, portable equipment, and the like. Theterminal device may communicate with one or more core networks by usinga radio access network (RAN). For example, the terminal device may be amobile phone (or referred to as a “cellular” phone), or a computerhaving a wireless communication function; or the terminal device may bea portable, pocket-sized, handheld, computer built-in, orvehicle-mounted mobile apparatus or device.

FIG. 1a is a schematic architectural diagram of a communications systemaccording to this application.

As shown in FIG. 1a , a communications system 01 includes a networkdevice 101 and a terminal device 102. When the communications system 01includes a core network, the network device 101 may be further connectedto the core network. The network device 101 may further communicate withan Internet protocol (IP) network 200, for example, the Internet, aprivate IP network, or another data network. The network device providesa service for a terminal device within coverage. For example, referringto FIG. 1a , the network device 101 provides radio access for one ormore terminal devices within coverage of the network device 101. Inaddition, network devices may communicate with each other.

The network device 101 may be a device configured to communicate withthe terminal device. For example, the network device may be a basetransceiver station (BTS) in a GSM system or a CDMA system, may be aNodeB (NB) in a WCDMA system, or may be an evolved NodeB (eNB or eNodeB)in an LTE system or a network side device in a future 5G network; or thenetwork device may be a relay station, an access point, avehicle-mounted device, or the like. In a terminal device to terminaldevice (D2D) communications system, the network device may alternativelybe a terminal device having a function of a base station. The terminaldevice may include various handheld devices having a wirelesscommunication function, a vehicle-mounted device, a wearable device, acomputing device, or another processing device connected to a wirelessmodem, and various forms of user equipments (UE), mobile stations (MS),and the like.

In an NR communications system, a process in which a network devicesends a phase tracking reference signals (PTRS) signal to a terminaldevice includes: The network device determines a PTRS pattern thatrepresents PTRS distribution positions including a time domain positionand a frequency domain position. The network device sends a PTRS to theterminal device based on the PTRS pattern. The terminal device receivesa corresponding scheduling bandwidth threshold and scheduling MCSthreshold that are sent by the network device and that are used toindicate the PTRS pattern. The terminal device determines a PTRSfrequency domain density based on one group of received schedulingbandwidth thresholds, determines a PTRS time domain density based on onegroup of received scheduling MCS thresholds, determines the phasetracking reference signal pattern based on the PTRS time domain densityand the PTRS frequency domain density, and receives, based on thedetermined PTRS pattern, the PTRS sent by the network device. Table 1lists association relationships between scheduling MCSs and PTRS timedomain densities, and Table 2 lists association relationships betweenscheduling bandwidths and PTRS frequency domain densities.

TABLE 1 Scheduling MCS Time domain density I_(MCS) < ptrsthMCS₁ No PTRSexists ptrsthMCS₁ ≤ I_(MCS) < ptrsthMCS₂ 4 ptrsthMCS₂ ≤ I_(MCS) <ptrsthMCS₃ 2 ptrsthMCS₃ ≤ I_(MCS) < ptrsthMCS₄ 1

TABLE 2 Frequency domain Scheduling bandwidth density N_(RB) < ptrsthRB₀No PTRS exists ptrsthRB₀ ≤ N_(RB) < ptrsthRB₂ 2 ptrsthRB₂ ≤ N_(RB) <ptrsthRB₄ 4

A scheduling MCS threshold set {ptrsrhMCS₁, ptrsrhMCS₂, ptrsrhMCS₃,ptrsrhMCS₄} and a scheduling bandwidth threshold set {ptrsrhRB₀,ptrsrhRB₂, ptrsrhRB₄} in Table 1 and Table 2 are configured by a basestation for UE by using higher layer signaling (for example, radioresource control (radio resource control, RRC) signaling).ptrsrhMCS₁≤ptrsthMCS₂≤ptrsrhMCS₃≤ptrsthMCS₄. At least two schedulingbandwidth thresholds in the scheduling MCS threshold set are equal;therefore, the PTRS time domain density is not applicable to the mappingrelationship in Table 1. ptrsthRB₀≤ptrsthRB₂≤ptrsthRB₄. When at leasttwo scheduling bandwidth thresholds in the scheduling bandwidththreshold set are equal, the PTRS frequency domain density is notapplicable to the mapping relationship in Table 2. Each schedulingbandwidth threshold fixedly occupies 9 bits, and each scheduling MCSthreshold fixedly occupies 5 bits. Before the UE receives the schedulingMCS threshold set and the scheduling bandwidth threshold set that areconfigured by the base station, the UE may be capable of reporting onegroup of suggested scheduling MCS threshold sets and/or schedulingbandwidth threshold sets to the base station. When the terminal devicedirectly reports one group of scheduling bandwidth thresholds and onegroup of scheduling MCS thresholds, a quantity of consumed bits is5*4+9*3=47. In some scenarios, the terminal device needs to report aplurality of groups of scheduling bandwidth thresholds and a pluralityof groups of scheduling MCS thresholds, and a quantity of bits needingto be consumed is further increased.

FIG. 1 is a schematic diagram of different PTRS patterns. The networkdevice determines a phase tracking reference signal pattern based on atleast one of a current scheduling modulation and coding scheme and acurrent scheduling bandwidth and at least one of a modulation and codingscheme threshold corresponding to a phase tracking reference signalpattern requested by the terminal device, a scheduling resource blockquantity threshold corresponding to the phase tracking reference signalrequested by the terminal device, and an effect factor of phase noise ofthe terminal device on a signal received by the terminal device, wherethe modulation and coding scheme threshold, the scheduling resourceblock quantity threshold, and the effect factor are sent by the terminaldevice. In a drawing (a) in FIG. 1b , a PTRS frequency domain density is1 (there is one PTRS on every 12 subcarriers), and a time domain densityis 1; in a drawing (b), a PTRS frequency domain density is 1 (there isone PTRS on every 12 subcarriers (one RB)), and a time domain density is2 (every two symbols); and in a drawing (c), a PTRS frequency domaindensity is 2 (there is one PTRS on every 24 subcarriers (two RBs)), anda time domain density is 1.

FIG. 2 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. The method includes but is notlimited to the following steps.

S201: A terminal device determines at least one scheduling bandwidththreshold.

Specifically, the at least one scheduling bandwidth threshold includes afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, each scheduling bandwidth threshold may be represented by anRB (resource block, resource block) quantity, and the RB quantity is aninteger greater than or equal to 1. The at least one schedulingbandwidth threshold determined by the terminal device belongs to allpossible scheduling bandwidth thresholds of the terminal device. Forease of description, in this embodiment, all the possible schedulingbandwidth thresholds of the terminal device are referred to as a “valueset”, a maximum scheduling bandwidth threshold in the value set needs tobe less than or equal to a specified value, and the specified value isrelated to a maximum valid system bandwidth and a subcarrier spacingused by the terminal device. For example, the specified value is equalto RB_sym/(SCS_(UE)*12), where RB_sym is the maximum valid systembandwidth in a unit of Hz; SCS_(UE) represents the subcarrier spacingused by the terminal device in a unit of Hz; and 12 represents aquantity of subcarrier spacings corresponding to one RB. Assuming thatthe maximum valid system bandwidth is 400 M*0.96, and the subcarrierspacing used by the terminal device is 120 kHz, the specified value is400 M*0.96/120 k/12+1=267, or the specified value is greater than asystem bandwidth+1, for example, the specified value is 512.

Each of the at least one scheduling bandwidth threshold determined bythe terminal device is a natural number power of 2, that is, eachscheduling bandwidth threshold in the value set is a natural numberpower of 2, a natural number is an integer greater than or equal to 0,the scheduling bandwidth thresholds in the value set of the terminaldevice are 2⁰, 2¹, 2², . . . , and 2^(NidxMax), 2^(NidxMax) is a minimumpower of 2 that is greater than the system bandwidth, and the terminaldevice determines at least one different scheduling bandwidth thresholdin the value set.

An example is used for description: If the specified value is 512, thescheduling bandwidth thresholds in the value set are {1, 2, 4, 8, 16,32, 64, 128, 256, 512}, and a quantity of the scheduling bandwidththresholds in the value set is 10. It is assumed that three schedulingbandwidth thresholds determined by the terminal device are 2, 8, and 64in the value set.

S202: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one correspondencewith the at least one scheduling bandwidth threshold, and each elementis used to indicate one of the at least one scheduling bandwidththreshold. For example, a first element in the at least one element isused to indicate a first scheduling bandwidth threshold in the at leastone scheduling bandwidth threshold, and a second element in the at leastone element is used to indicate a second scheduling bandwidth thresholdin the at least one scheduling bandwidth threshold. All the schedulingbandwidth thresholds in the value set are numbered, and an element is anumber of a scheduling bandwidth threshold. A numbering rule for thescheduling bandwidth thresholds in the value set may be that numberingis performed in ascending order starting from 1 by using a step of 1,and a number increases as a scheduling bandwidth threshold increases; ornumbering is performed in ascending order starting from 0 by using astep of 1, and a number increases as a scheduling bandwidth thresholdincreases; or numbering is performed in descending order starting fromthe quantity of the scheduling bandwidth thresholds in the value set byusing a step of 1, and a number decreases as a scheduling bandwidththreshold increases; or another numbering manner is used. This is notlimited in this embodiment. The terminal device prestores orpreconfigures mapping relationships between all the possible schedulingbandwidth thresholds and elements, and the terminal device generates,based on the mapping relationships, the at least one elementcorresponding to the at least one scheduling bandwidth threshold. Themapping relationships may be expressed by using a mapping table or aformula.

For example, the mapping relationships prestored or preconfigured by theterminal device are listed in a mapping table in Table 3:

TABLE 3 Scheduling bandwidth threshold Element value 1 1 2 2 4 3 8 4 165 32 6 64 7 128 8 256 9 512 10

Assuming that the three scheduling bandwidth thresholds determined bythe terminal device are 2, 16, and 64, values of three elementsgenerated by the terminal device based on the foregoing mappingrelationships are respectively 2, 5, and 7.

For another example, the mapping relationships prestored orpreconfigured by the terminal device are listed in Table 4:

TABLE 4 Scheduling bandwidth threshold Element value 1 10 2 9 4 8 8 7 166 32 5 64 4 128 3 256 2 512 1

Assuming that the three scheduling bandwidth thresholds determined bythe terminal device are 2, 16, and 64, values of three elementsgenerated by the terminal device are 9, 6, and 4.

For another example, the mapping relationships prestored orpreconfigured by the terminal device are listed in Table 5:

TABLE 5 Scheduling bandwidth threshold Element value 1 0 2 1 4 3 8 5 167 32 2 64 4 128 6 256 8 512 9

Assuming that the three scheduling bandwidth thresholds determined bythe terminal device are 2, 16, and 64, values of three elementsgenerated by the terminal device are 1, 7, and 4.

In a possible implementation, the mapping relationships may be expressedby using a formula: A value of each element is a logarithm of acorresponding scheduling bandwidth threshold to a base 2. For example, avalue of the first element is a logarithm of the first schedulingbandwidth threshold to the base 2, that is, c₁=log₂ ptrsthRB₁, c₁ is thefirst element, log₂ represents a logarithmic operation to the base 2,and ptrsthRB₁ represents the first scheduling bandwidth threshold. Avalue of the second element is a logarithm of the second schedulingbandwidth threshold to the base 2.

For example, the three scheduling bandwidth thresholds determined by theterminal device are 2, 8, and 64, and the three elements generated bythe terminal device are log₂ 2, log₂ 8, and log₂ 64, that is, the valuesof the three generated elements are 1, 3, and 6.

S203: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling bandwidth thresholds in the value set,a quantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S≤2^(b), where S is the quantity of thescheduling bandwidth thresholds in the value set, and b is the bitquantity. For example, the quantity of the scheduling bandwidththresholds in the value set is 10. According to the foregoing formula,b=4, and the terminal device uses 4 bits to represent each element. Forexample, if the three generated elements are 1, 6, and 7, the threeelements sent by the terminal device are respectively 0001, 0110, and0111, and a total of 12 bits are required. Compared with an existingscheduling bandwidth threshold, each scheduling bandwidth threshold isfixedly reported by using 9 bits, in this embodiment of the presentdisclosure, 15 bits are reduced, and overheads for reporting thescheduling bandwidth thresholds by the terminal device are greatlyreduced.

S204: The network device obtains the at least one scheduling bandwidththreshold.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling bandwidth thresholds and theelements, and the network device obtains the at least one schedulingbandwidth threshold based on the received element. The mappingrelationships may be expressed by using a mapping table (for example, aslisted in Table 3 to Table 5) or a formula. This step is an inverseprocess of S202. For a specific process, refer to the descriptions ofS202. Details are not described herein again.

In the method described in FIG. 2, the scheduling bandwidth thresholddetermined by the terminal device is a natural number power of 2, andthe terminal device reports the element associated with the schedulingbandwidth threshold to the network device, thereby reducing a quantityof bits required for reporting by the terminal device, and reducingreporting overheads.

FIG. 3 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S301: A terminal device determines at least one scheduling bandwidththreshold, where each scheduling bandwidth threshold is greater than apreset value.

Specifically, the at least one scheduling bandwidth threshold includes afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, each scheduling bandwidth threshold may be represented by anRB quantity, and the RB quantity is an integer greater than or equalto 1. In this embodiment, for ease of description, a set of all possiblescheduling bandwidth thresholds of the terminal device is referred to asa “value set”, a maximum scheduling bandwidth threshold in the value setneeds to be less than or equal to a specified value, and the specifiedvalue is related to a maximum valid system bandwidth and a subcarrierspacing used by the terminal device. For example, the specified value isequal to RB_sym/(SCS_(UE)*12), where RB_sym is the maximum valid systembandwidth in a unit of Hz; SCS_(UE) represents the subcarrier spacingused by the terminal device in a unit of Hz; and 12 represents aquantity of subcarrier spacings corresponding to one RB. Assuming thatthe maximum valid system bandwidth is 400 M*0.96, and the subcarrierspacing used by the terminal device is 120 kHz, the specified value is400 M*0.96/120 k/12+1=267. Optionally, the specified value may begreater than the maximum system bandwidth+1, for example, the specifiedvalue may be 512.

Each of the at least one scheduling bandwidth threshold is greater thanthe preset value, that is, each scheduling bandwidth threshold in thevalue set is greater than the preset value, the preset value may be avalue preconfigured or prestored by the terminal device, and a specificvalue of the preset value is not limited in this embodiment. Theterminal device determines the at least one scheduling bandwidththreshold in the value set.

For example, if the specified value is 267, and the preset value is 199,the value set of the terminal device is {200, 201, 202, . . . , 265,266, 267}. A quantity of the scheduling bandwidth thresholds in thevalue set is 68. It is assumed that three scheduling bandwidththresholds determined by the terminal device are 201, 240, and 260 inthe value set.

In another possible implementation, each of the at least one schedulingbandwidth threshold is a natural number power of 2, that is, eachscheduling bandwidth threshold in the value set is greater than thepreset value and is a natural number power of 2.

For example, if the specified value is 512, and the preset value is 50,the value set is {64, 128, 256, 512}, and three scheduling bandwidththresholds selected by the terminal device from the value set are 64,128, and 256.

In another possible implementation, each of the at least one schedulingbandwidth threshold is a product of a natural number power of 2, anatural number power of 3, and a natural number power of 5, and eachscheduling bandwidth threshold in the value set is greater than thepreset value and is a product of a natural number power of 2, a naturalnumber power of 3, and a natural number power of 5.

For example, if the specified value is 270 (a minimum natural numbergreater than a system bandwidth and satisfying a product of a naturalnumber power of 2, a natural number power of 3, and a natural numberpower of 5), and the preset value is 150, the value set is {160, 162,180, 192, 200, 216, 225, 240, 243, 250, 256, 270}.

S302: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one mappingrelationship with the at least one scheduling bandwidth threshold, andeach element is used to indicate a first scheduling bandwidth threshold.For example, a first element in the at least one element is used toindicate a first scheduling bandwidth threshold in the at least onescheduling bandwidth threshold, and a second element in the at least oneelement is used to indicate a second scheduling bandwidth threshold inthe at least one scheduling bandwidth threshold. All the schedulingbandwidth thresholds in the value set are numbered, and an element is anumber of a scheduling bandwidth threshold. A numbering rule for thescheduling bandwidth thresholds in the value set may be that numberingis performed in ascending order starting from 1 by using a step of 1,and a number increases as a scheduling bandwidth threshold increases; ornumbering is performed in ascending order starting from 0 by using astep of 1, and a number increases as a scheduling bandwidth thresholdincreases; or numbering is performed in descending order starting fromthe quantity of the scheduling bandwidth thresholds in the value set byusing a step of 1, and a number decreases as a scheduling bandwidththreshold increases; or another numbering rule is used to number thescheduling bandwidth thresholds in the value set. This is not limited inthis embodiment. The terminal device prestores or preconfigurescorrespondences between all the possible scheduling bandwidth thresholdsand elements, and the terminal device obtains, based on the mappingrelationships, the at least one element corresponding to the at leastone scheduling bandwidth threshold. The mapping relationships may beexpressed by using a mapping table or a formula.

According to the example in S302, the mapping relationships prestored orpreconfigured by the terminal device are listed in Table 6:

TABLE 6 Scheduling bandwidth threshold Element value 258 1 259 2 260 3261 4 262 5 263 6 264 7 265 8 266 9 267 10

Assuming that the three scheduling bandwidth thresholds determined bythe terminal device are 258, 262, and 266, values of three elementsobtained by the terminal device are 1, 5, and 9.

S303: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling bandwidth thresholds in the value set,a quantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S≤2^(b), where S is the quantity of thescheduling bandwidth thresholds in the value set, and b is the bitquantity. For example, the quantity of the scheduling bandwidththresholds in the value set is 10. According to the foregoing formula,b=4, and the terminal device uses 4 bits to represent each element. Forexample, the at least one element generated by the terminal device is 1,5, and 9, values sent by the terminal device to the network device are0001, 0101, and 1001, and a total of 12 bits are occupied. Compared withthe prior art in which 9 bits are fixedly occupied by each schedulingbandwidth threshold, in this embodiment of the present disclosure, 15bits are reduced, and overheads for reporting the scheduling bandwidththresholds by the terminal device are greatly reduced.

S304: The network device obtains the at least one scheduling bandwidththreshold.

Specifically, the network device prestores or preconfigures thecorrespondences between all the possible scheduling bandwidth thresholdsand elements. The correspondences may be expressed by using a mappingtable or a formula. The network device generates the at least onecorresponding scheduling bandwidth threshold based on the at least onereceived element.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling bandwidth thresholds and theelements, and the network device obtains the at least one schedulingbandwidth threshold based on the received element. The mappingrelationships may be expressed by using a mapping table (for example, aslisted in Table 6) or a formula. This step is an inverse process ofS302. For a specific process, refer to the descriptions of S302. Detailsare not described herein again.

In the method described in FIG. 3, the scheduling bandwidth thresholddetermined by the terminal device is greater than the preset value, andthe terminal device reports the element associated with the schedulingbandwidth threshold to the network device, thereby reducing a quantityof bits required for reporting by the terminal device, and reducingreporting overheads.

FIG. 4 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S401: A terminal device determines at least one scheduling bandwidththreshold, where each scheduling bandwidth threshold is a product of anatural number power of 2, a natural number power of 3, and a naturalnumber power of 5.

Specifically, the at least one scheduling bandwidth threshold includes afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, each scheduling bandwidth threshold may be represented by anRB quantity, and the RB quantity is an integer greater than or equalto 1. The at least one scheduling bandwidth threshold determined by theterminal device belongs to all possible scheduling bandwidth thresholdsof the terminal device. For ease of description, in this embodiment, allthe possible scheduling bandwidth thresholds of the terminal device arereferred to as a “value set”, a maximum scheduling bandwidth thresholdin the value set needs to be less than or equal to a specified value,and the specified value is related to a maximum valid system bandwidthand a subcarrier spacing used by the terminal device. For example, thespecified value is equal to RB_sym/(SCS_(UE)*12), where RB_sym is themaximum valid system bandwidth; SCS_(UE) represents the subcarrierspacing used by the terminal device; and 12 represents a quantity ofsubcarrier spacings corresponding to one RB. Assuming that the maximumvalid system bandwidth is 400 M*0.96, and the subcarrier spacing used bythe terminal device is 120 kHz, the specified value is 400 M*0.96/120k/12+1=267, or the specified value is a minimum natural number greaterthan a system bandwidth and satisfying a product of a natural numberpower of 2, a natural number power of 3, and a natural number power of5, for example, 270.

Each of the at least one scheduling bandwidth threshold is a product ofa natural number power of 2, a natural number power of 3, and a naturalnumber power of 5, that is, each scheduling bandwidth threshold in thevalue set is a product of a natural number power of 2, a natural numberpower of 3, and a natural number power of 5. The terminal devicedetermines at least one different scheduling bandwidth threshold in thevalue set.

An example is used for description: The specified value is 270, thevalue set is {1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 25,27, 30, 32, 36, 40, 45, 48, 50, 54, 60, 64, 72, 75, 80, 81, 90, 96, 100,108, 120, 125, 128, 135, 144, 150, 160, 162, 180, 192, 200, 216, 225,240, 243, 250, 256, 270}, there are a total of 53 scheduling bandwidththresholds in the value set, and each element in the value set is aproduct of a natural number power of 2, a natural number power of 3, anda natural number power of 5. It is assumed that three schedulingbandwidth thresholds determined by the terminal device in the value setare 1, 6, and 32.

It should be noted that, some scheduling bandwidth thresholds notsatisfying a natural number power of 2, a natural number power of 3, ora natural number power of 5 may be added to the value set according to arequirement. Optionally, 0 is added to the current value set.Optionally, 270 may be replaced by a number greater than 256.

In a possible implementation, each of the at least one schedulingbandwidth threshold is greater than the preset value, that is, eachscheduling bandwidth threshold in the value set is greater than thepreset value and is a product of a natural number power of 2, a naturalnumber power of 3, and a natural number power of 5.

An example is used for description: The specified value is 267, thepreset value is 200, and the value set is {216, 225, 240, 243, 250, 256,267}. It is assumed that the three scheduling bandwidth thresholdsdetermined by the terminal device in the value set are 216, 243, and256.

In a possible implementation, a waveform used by the terminal device isDFT-S-OFDM.

S402: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one correspondencewith the at least one scheduling bandwidth threshold, and each elementis used to indicate one scheduling bandwidth threshold. For example, afirst element in the at least one element is used to indicate a firstscheduling bandwidth threshold in the at least one scheduling bandwidththreshold, and a second element in the at least one element is used toindicate a second scheduling bandwidth threshold in the at least onescheduling bandwidth threshold. All the scheduling bandwidth thresholdsin the value set are numbered, and an element is a number of ascheduling bandwidth threshold. A numbering rule for the schedulingbandwidth thresholds in the value set may be that numbering is performedin ascending order starting from 1 by using a step of 1, and a numberincreases as a scheduling bandwidth threshold increases; or numbering isperformed in ascending order starting from 0 by using a step of 1, and anumber increases as a scheduling bandwidth threshold increases; ornumbering is performed in descending order starting from the quantity ofthe scheduling bandwidth thresholds in the value set by using a step of1, and a number decreases as a scheduling bandwidth threshold increases;or another numbering manner is used. This is not limited in thisembodiment. The terminal device prestores or preconfigures mappingrelationships between all the possible scheduling bandwidth thresholdsand elements, and the terminal device generates, based on thecorrespondences, the at least one element corresponding to the at leastone scheduling bandwidth threshold. The mapping relationships may beexpressed by using a mapping table or a formula.

For example, the mapping relationships preconfigured or prestored by theterminal device are listed in Table 7:

TABLE 7 Scheduling bandwidth threshold Element value 216 1 225 2 240 3243 4 250 5 256 6 267 7

Assuming that the three scheduling bandwidth thresholds determined bythe terminal device are 216, 243, and 256, values of three elementsgenerated by the terminal device based on the mapping relationships inTable 7 are 1, 4, and 6.

S403: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling bandwidth thresholds in the value set,a quantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S≤2^(b), where S is the quantity of thescheduling bandwidth thresholds in the value set, and b is the bitquantity. For example, the quantity of the scheduling bandwidththresholds in the value set is 6. According to the foregoing formula,b=3, and the terminal device uses 3 bits to represent each element. Forexample, if the three generated elements are 1, 4, and 6, the threeelements sent by the terminal device are 001, 100, and 111, and a totalof 9 bits are required. Compared with the prior art in which 9 bits arefixedly used to report each scheduling bandwidth threshold, in thisembodiment of the present disclosure, overheads for reporting thescheduling bandwidth thresholds by the terminal device are greatlyreduced.

S404: The network device obtains the at least one scheduling bandwidththreshold, where each scheduling bandwidth threshold is less than orequal to a maximum bandwidth supported by the terminal device.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling bandwidth thresholds and theelements, and the network device obtains the at least one schedulingbandwidth threshold based on the received element. The mappingrelationships may be expressed by using a mapping table (for example, aslisted in Table 7) or a formula. This step is an inverse process ofS402. For a specific process, refer to the descriptions of S402. Detailsare not described herein again.

In the method described in FIG. 4, the scheduling bandwidth thresholddetermined by the terminal device is a product of a natural number powerof 2, a natural number power of 3, and a natural number power of 5, andthe terminal device reports the element associated with the schedulingbandwidth threshold to the network device, thereby reducing a quantityof bits required for reporting by the terminal device, and reducingreporting overheads.

FIG. 5 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S501: A terminal device determines at least one scheduling bandwidththreshold, where each scheduling bandwidth threshold is less than orequal to a maximum bandwidth supported by the terminal device.

Specifically, the at least one scheduling bandwidth threshold includes afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, each scheduling bandwidth threshold may be represented by anRB quantity, and the RB quantity is an integer greater than or equalto 1. The at least one scheduling bandwidth threshold determined by theterminal device belongs to all possible scheduling bandwidth thresholdsof the terminal device. For ease of description, in this embodiment, allthe possible scheduling bandwidth thresholds of the terminal device arereferred to as a “value set”, a maximum scheduling bandwidth thresholdin the value set needs to be less than or equal to a specified value,and the specified value is related to a maximum valid system bandwidthand a subcarrier spacing used by the terminal device. For example, thespecified value is equal to RB_sym/(SCS_(UE)*12)+1, where RB_sym is themaximum valid system bandwidth; SCS_(UE) represents the subcarrierspacing used by the terminal device; and 12 represents a quantity ofsubcarrier spacings corresponding to one RB. Assuming that the maximumvalid system bandwidth is 400 M*0.96, and the subcarrier spacing used bythe terminal device is 120 kHz, the specified value is 400 M*0.96/120k/12+1=267, or the specified value is a value satisfying anothercondition.

Each of the at least one scheduling bandwidth threshold determined bythe terminal device is less than or equal to the maximum bandwidthsupported by the terminal device, that is, each scheduling bandwidththreshold in the value set is less than or equal to the maximumbandwidth supported by the terminal device, and the maximum bandwidthsupported by the terminal device may be represented by an RB quantity.The terminal device determines at least one different schedulingbandwidth threshold in the value set. It may be understood that, themaximum bandwidth supported by the terminal device is apparently lessthan the specified value.

An example is used for description: If the maximum bandwidth supportedby the terminal device is 66 RBs, the value set is {1, 2, 3, . . . , 65,66, 67}. It is assumed that three scheduling bandwidth thresholdsdetermined by the terminal device in the value set are 1, 30, and 50.

In a possible implementation, each of the at least one schedulingbandwidth threshold is a natural number power of 2, that is, eachscheduling bandwidth threshold in the value set is less than or equal tothe maximum bandwidth supported by the terminal device and is a naturalnumber power of 2.

In a possible implementation, each of the at least one schedulingbandwidth threshold is a product of a natural number power of 2, anatural number power of 3, and a natural number power of 5, that is,each scheduling bandwidth threshold in the value set is less than orequal to the maximum bandwidth supported by the terminal device and is aproduct of a natural number power of 2, a natural number power of 3, anda natural number power of 5.

S502: The terminal device sends the at least one scheduling bandwidththreshold to a network device, where the network device receives the atleast one scheduling bandwidth threshold from the terminal device.

Specifically, the terminal device sends the at least one schedulingbandwidth threshold to the network device by using a bit, and theterminal device determines, based on a quantity of the schedulingbandwidth thresholds in the value set, a quantity of bits used to sendeach element. The bit quantity is a minimum integer of b satisfyingS<2^(b), where S is the quantity of the scheduling bandwidth thresholdsin the value set, and b is the bit quantity. For example, the quantityof the scheduling bandwidth thresholds in the value set is 70. Accordingto the foregoing formula, b=7, and the terminal device uses 7 bits torepresent each element. For example, if the three determined schedulingbandwidth thresholds are 1, 30, and 50, three scheduling bandwidththresholds sent by the terminal device by using bits are 0000001,0011110, and 0110010, and a total of 21 bits are required. Compared withthe prior art in which 9 bits are fixedly used to report each schedulingbandwidth threshold, in this embodiment of the present disclosure,overheads for reporting the scheduling bandwidth thresholds by theterminal device are greatly reduced.

FIG. 6 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S601: A terminal device determines two scheduling bandwidth thresholds.

Specifically, in the prior art, one group of scheduling bandwidththresholds reported by a terminal device includes three schedulingbandwidth thresholds: a first scheduling bandwidth threshold, a secondscheduling bandwidth threshold, and a third scheduling bandwidththreshold. The first scheduling bandwidth threshold is a minimum value,the third scheduling bandwidth threshold is a maximum value, and thesecond scheduling bandwidth threshold is greater than the firstscheduling bandwidth threshold and less than the third schedulingbandwidth threshold. In this embodiment of the present disclosure, twoscheduling bandwidth thresholds determined by the terminal device are afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, and a third scheduling bandwidth threshold is a defaultvalue. For example, for the third scheduling bandwidth threshold isrelated to a maximum bandwidth supported by the terminal device, themaximum bandwidth may be represented by an RB quantity, and the thirdscheduling bandwidth threshold is less than or equal to 1 plus themaximum bandwidth supported by the terminal device. The terminal devicefurther needs to report the supported maximum bandwidth, and a networkdevice may determine the third scheduling bandwidth threshold based onthe maximum bandwidth reported by the terminal device.

S602: The terminal device sends the two scheduling bandwidth thresholdsto the network device.

Specifically, the terminal device sends the two scheduling bandwidththresholds by using bits. Compared with the prior art in which threescheduling bandwidth thresholds need to be reported, in this embodimentof the present disclosure, overheads for reporting the schedulingbandwidth thresholds by the terminal device are greatly reduced.

FIG. 7 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S701: A terminal device determines at least one scheduling bandwidththreshold associated with a first subcarrier spacing.

Specifically, in the prior art, a terminal device needs to report atleast one scheduling bandwidth threshold for each subcarrier spacingbased on different supported subcarrier spacings. For example, if theterminal device supports a subcarrier spacing of 60 kHz and a subcarrierspacing of 120 kHz, the terminal device needs to separately report threescheduling bandwidth thresholds associated with 60 kHz and threescheduling bandwidth thresholds associated with 120 kHz to a networkdevice. In this application, the terminal device uses the firstsubcarrier spacing as a default subcarrier spacing, and the terminaldevice only needs to report the at least one scheduling bandwidththreshold associated with the first subcarrier spacing to the networkdevice. For example, if the default subcarrier spacing is 120 kHz, theterminal device determines at least one scheduling bandwidth thresholdassociated with 120 kHz.

In a possible design, the first subcarrier spacing is associated withtwo scheduling bandwidth thresholds. In the prior art, one group ofscheduling bandwidth thresholds associated with the first subcarrier andreported by the terminal device includes three scheduling bandwidththresholds: a first scheduling bandwidth threshold, a second schedulingbandwidth threshold, and a third scheduling bandwidth threshold. Thefirst scheduling bandwidth threshold is a minimum value, the thirdscheduling bandwidth threshold is a maximum value, and the secondscheduling bandwidth threshold is greater than the first schedulingbandwidth threshold and less than the third scheduling bandwidththreshold. In this application, a third scheduling bandwidth thresholdis a default value, the network device already knows the thirdscheduling bandwidth threshold, and the terminal device only needs toreport only a first scheduling bandwidth threshold and a secondscheduling bandwidth threshold.

S702: The terminal device sends the at least one scheduling bandwidththreshold associated with the first subcarrier to the network device,and the network device receives, from the terminal device, the at leastone scheduling bandwidth threshold associated with the first subcarrier.

Specifically, the terminal device may send, to the network device byusing a bit, the at least one scheduling bandwidth threshold associatedwith the first subcarrier spacing. When the terminal device supports atleast one different subcarrier spacing, the terminal device only needsto report at least one scheduling bandwidth threshold associated withone subcarrier spacing, without reporting one group of schedulingbandwidth thresholds for each subcarrier spacing, thereby greatlyreducing reporting overheads.

S703: The network device determines, based on a ratio value of a secondsubcarrier to the first subcarrier spacing, at least one schedulingbandwidth threshold associated with the second subcarrier spacing.

Specifically, the network device determines, based on a ratiorelationship between the first subcarrier spacing and the secondsubcarrier spacing, the at least one scheduling bandwidth thresholdassociated with the second subcarrier spacing.

For example, when the first subcarrier spacing is 120 kHz, assuming thatat least one scheduling bandwidth threshold associated with 120 kHz,reported by the terminal device, and received by the network device is10, 25, and 67, a method for determining, by the network device, threescheduling bandwidth thresholds associated with a subcarrier spacing of60 kHz is: determining that a ratio of the first subcarrier spacing tothe second subcarrier spacing is 120 kHz/60 kHz=2, multiplying the threescheduling bandwidth thresholds associated with 120 kHz by 2 to obtainthe three scheduling bandwidth thresholds associated with 60 kHz: 10*2,25*2, and 6*2.

For another example, when the first subcarrier spacing is 60 kHz,assuming that three scheduling bandwidth thresholds associated with 60kHz, reported by the terminal device, and received by the network deviceare 10, 24, and 133, a method for determining, by the network device,three scheduling bandwidth thresholds associated with the secondsubcarrier spacing of 120 kHz is: determining that a ratio of the firstsubcarrier spacing to the second subcarrier is 60 kHz/120 kHz=½, andmultiplying the three scheduling bandwidth thresholds associated with 60kHz by ½ to obtain the three scheduling bandwidth thresholds associatedwith 120 kHz: 10/2, 24/2, and ┌133/2┐, where ┌ ┐ represents rounding upto a nearest integer.

According to the descriptions of FIG. 7 when the terminal devicesupports at least one different subcarrier spacing, the terminal deviceonly needs to report at least one scheduling bandwidth thresholdassociated with one subcarrier spacing, without reporting one group ofscheduling bandwidth thresholds for each subcarrier spacing, therebygreatly reducing reporting overheads.

FIG. 8 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S801: A terminal device determines n scheduling bandwidth thresholds:ptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n).

Specifically, n is an integer greater than 1, ptrsthRB₁<ptrsthRB₂< . . .<ptrsthRB_(n), each scheduling bandwidth threshold may be represented byan RB quantity, and the RB quantity is an integer greater than or equalto 1. The n scheduling bandwidth thresholds determined by the terminaldevice belong to all possible scheduling bandwidth thresholds of theterminal device. For ease of description, in this embodiment, all thepossible scheduling bandwidth thresholds of the terminal device arereferred to as a “value set”, a maximum scheduling bandwidth thresholdin the value set needs to be less than or equal to a specified value,and the specified value is related to a maximum valid system bandwidthand a subcarrier spacing used by the terminal device. For example, thespecified value is equal to RB_sym/(SCS_(UE)*12)+1, where RB_sym is themaximum valid system bandwidth; SCS_(UE) represents the subcarrierspacing used by the terminal device; and 12 represents a quantity ofsubcarrier spacings corresponding to one RB. Assuming that the maximumvalid system bandwidth is 400 M*0.96, and the subcarrier spacing used bythe terminal device is 120 kHz, the specified value is 400 M*0.96/120k/12+1=267.

For example, it is assumed that the value set is {1, 2, 3, . . . , 265,266, 267}, n=3, and a set of three scheduling bandwidth thresholdsdetermined by the terminal device is {10, 20, 80}.

In a possible design, n=2. In the prior art, one group of schedulingbandwidth thresholds reported by a terminal device includes threescheduling bandwidth thresholds: a first scheduling bandwidth threshold,a second scheduling bandwidth threshold, and a third schedulingbandwidth threshold. The first scheduling bandwidth threshold is aminimum value, the third scheduling bandwidth threshold is a maximumvalue, and the second scheduling bandwidth threshold is greater than thefirst scheduling bandwidth threshold and less than the third schedulingbandwidth threshold. In this embodiment of the present disclosure, twoscheduling bandwidth thresholds determined by the terminal device are afirst scheduling bandwidth threshold and a second scheduling bandwidththreshold, and a third scheduling bandwidth threshold is a defaultvalue. For example, for the third scheduling bandwidth threshold and amaximum bandwidth supported by the terminal device, the maximumbandwidth may be represented by an RB quantity, and the third schedulingbandwidth threshold is equal to 1 plus the maximum bandwidth supportedby the terminal device.

In a possible design, when the terminal device supports a plurality ofdifferent subcarrier spacings, the terminal device reports only at leastone scheduling bandwidth threshold associated with a first subcarrierspacing, thereby reducing a quantity of groups of bandwidth thresholdsreported by the terminal device, and reducing reporting overheads.

In a possible implementation, in this embodiment, a method for reportinga scheduling bandwidth threshold may be performed with reference to anelement use manner in FIG. 2 to FIG. 4, to reduce a quantity of bitsoccupied by each scheduling bandwidth threshold, thereby furtherreducing reporting overheads. For a specific method, refer to thedescriptions of FIG. 2 to FIG. 4. Details are not described hereinagain.

S802: The terminal device sends ptrsthRB₁, ptrsthRB₂−ptrsthRB₁, . . . ,and ptrsthRB_(n)−ptrsthRB_(n-1) to a network device, and the networkdevice receives ptrsthRB₁, ptrsthRB₂−ptrsthRB₁, . . . , andptrsthRB_(n)−ptrsthRB_(n-1) sent by the terminal device.

Specifically, values of n elements reported by the terminal device tothe network device are ptrsthRB₁, ptrsthRB₂−ptrsthRB₁, . . . , andptrsthRB_(n)−ptrsthRB_(n-1), and the n elements are in a one-to-onecorrespondence with the n scheduling bandwidth thresholds. For example,ptrsthRB₁ in the n elements is used to indicate ptrsthRB₁ in the nscheduling bandwidth thresholds, and ptrsthRB₂−ptrsthRB₁ in the nelements is used to indicate ptrsthRB₂ in the n scheduling bandwidththresholds. The terminal device may report the n elements to the networkdevice by using bits.

The terminal device reports ptrsthRB₁ by using an existing default bit,for example, sends ptrsthRB₁ by using 9 default bits. For n−1differential values: ptrsthRB₂−ptrsthRB₁, . . . , andptrsthRB_(n)−ptrsthRB_(n-1), the terminal device determines a maximumvalue S_(max) in the n−1 differential values, the terminal devicedetermines a quantity of bits used to send the n−1 differential values,and the bit quantity b is a minimum integer of b satisfyingS_(max)≤2^(b).

For example, according to the example in S801, if the set of the threescheduling bandwidth thresholds determined by the terminal device is{10, 20, 80}, three elements reported by the terminal device are {10,10, 60}. If it is determined that the quantity of bits used to send thedifferential values is 4, {000001010, 001010, 111100} is reported byusing bits. Compared with the prior art in which 9 bits are fixedly usedto report each scheduling bandwidth threshold, in this embodiment of thepresent disclosure, reporting overheads of the terminal device aregreatly reduced.

According to the descriptions of FIG. 8, the terminal device reports thescheduling bandwidth threshold to the network device in a differentialmanner. In this way, a quantity of bits occupied by the schedulingbandwidth threshold can be reduced, and reporting overheads of theterminal device can be reduced.

FIG. 9 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S901: A terminal device determines n scheduling bandwidth thresholds:ptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n).

Specifically, n is an integer greater than 1, ptrsthRB₁<ptrsthRB₂< . . .<ptrsthRB_(n), each scheduling bandwidth threshold may be represented byan RB quantity, and the RB quantity is an integer greater than or equalto 1. The n scheduling bandwidth thresholds determined by the terminaldevice belong to all possible scheduling bandwidth thresholds of theterminal device. For ease of description, in this embodiment, all thepossible scheduling bandwidth thresholds of the terminal device arereferred to as a “value set”, a maximum scheduling bandwidth thresholdin the value set needs to be less than or equal to a specified value,and the specified value is related to a maximum valid system bandwidthand a subcarrier spacing used by the terminal device. For example, thespecified value is equal to RB_sym/(SCS_(UE)*12)+1, where RB_sym is themaximum valid system bandwidth; SCS_(UE) represents the subcarrierspacing used by the terminal device; and 12 represents a quantity ofsubcarrier spacings corresponding to one RB. Assuming that the maximumvalid system bandwidth is 400 M*0.96, and the subcarrier spacing used bythe terminal device is 120 kHz, the specified value is 400 M*0.96/120k/12+1=267, or the specified value is a value satisfying anothercondition.

For example, it is assumed that the value set is {1, 2, 3, . . . , 265,266, 267}, n=3, and a set of three scheduling bandwidth thresholdsdetermined by the terminal device is {50, 60, 70}.

S902: The terminal device sends ptrsthRB₂−ptrsthRB₁,ptrsthRB₃−ptrsthRB₂, . . . , ptrsthRB_(n)−ptrsthRB_(n-1), andptrsthRB_(n) to a network device.

Specifically, values of n elements reported by the terminal device tothe network device are ptrsthRB₁, ptrsthRB₂−ptrsthRB₁, . . . , andptrsthRB_(n)−ptrsthRB_(n-1), and the n elements are in a one-to-onecorrespondence with the n scheduling bandwidth thresholds. For example,ptrsthRB₂−ptrsthRB₁ in the n elements is used to indicate ptrsthRB₁ inthe n scheduling bandwidth thresholds, and ptrsthRB₃−ptrsthRB₂ in the nelements is used to indicate ptrsthRB₂ in the n scheduling bandwidththresholds. The terminal device may report the n elements to the networkdevice by using bits.

The terminal device reports ptrsthRB_(n) by using an existing defaultbit position, for example, sends ptrsthRB_(n) by using 9 default bits.For n−1 differential values: ptrsthRB₂−ptrsthRB₁, . . . , andptrsthRB_(n)−ptrsthRB_(n-1), the terminal device determines a maximumvalue S_(max) in the n−1 differential values, the terminal devicedetermines a quantity of bits used to send the n−1 differential values,and the bit quantity b is a minimum integer of b satisfyingS_(max)≤2^(b).

For example, according to the example in S901, if the set of the threescheduling bandwidth thresholds determined by the terminal device is{50, 60, 70}, three elements reported by the terminal device are {10,10, 70}. When a difference range is limited within 16 (b=4), {1010,1010, 001000110} is reported by using bits. Compared with the prior artin which 9 bits are fixedly used to report each scheduling bandwidththreshold, in this embodiment of the present disclosure, reportingoverheads of the terminal device are greatly reduced.

According to the descriptions of FIG. 9, the terminal device reports thescheduling bandwidth threshold to the network device in a differentialmanner. In this way, a quantity of bits occupied by the schedulingbandwidth threshold can be reduced, and reporting overheads of theterminal device can be reduced.

FIG. 10 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1001: A terminal device determines at least one scheduling MCSthreshold.

Specifically, the at least one scheduling MCS threshold includes a firstscheduling MCS threshold and a second scheduling MCS threshold, eachscheduling MCS threshold may be represented by an MCS index value, andthe MCS index value is an integer greater than or equal to 0. The atleast one MCS threshold determined by the terminal device belongs to allpossible scheduling MCS thresholds of the terminal device. For ease ofdescription, in this embodiment, all the possible scheduling MCSthresholds of the terminal device are referred to as a “value set”, anda maximum scheduling MCS threshold in the value set needs to be lessthan or equal to a specified value. For example, in NR, the specifiedvalue may be 31 or 32.

Each of the at least one scheduling MCS threshold determined by theterminal device is an even number, that is, each scheduling MCSthreshold in the value set is an even number, and the terminal devicedetermines at least one different scheduling MCS threshold in the valueset.

For example, if the specified value is 32, the scheduling MCS thresholdsin the value set are {2, 4, 6, 8, . . . , 26, 28, 30, 32}, and fourscheduling MCS thresholds determined by the terminal device in the valueset are {4, 8, 16, 18}.

In a possible implementation, each scheduling MCS threshold may begreater than a preset value, that is, each scheduling MCS threshold inthe value set is greater than the preset value and is an even number.

For example, if the specified value is 32, and the preset value is 20,the scheduling MCS thresholds in the value set are {22, 24, 26, 28, 30,32}.

S1002: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one correspondencewith the at least one scheduling MCS threshold, and each element is usedto indicate one scheduling MCS threshold. For example, a first elementin the at least one element indicates a first scheduling MCS thresholdin the at least one scheduling MCS threshold, and a second element inthe at least one element is used to indicate a second scheduling MCSthreshold in the at least one scheduling MCS threshold. All thescheduling MCS thresholds in the value set are numbered, and an elementis a number of a scheduling MCS threshold. A numbering rule for thescheduling MCS thresholds in the value set may be that numbering isperformed in ascending order starting from 1 by using a step of 1, and anumber increases as a scheduling MCS threshold increases; or numberingis performed in ascending order starting from 0, and a number increasesas a scheduling MCS threshold increases; or numbering is performed indescending order starting from a quantity of the scheduling MCSthresholds in the value set by using a step of 1, and a number decreasesas a scheduling MCS threshold increases; or another numbering manner isused. This is not limited in this embodiment. The terminal deviceprestores or preconfigures mapping relationships between all thepossible scheduling MCS thresholds and elements, and the terminal devicegenerates the at least one element based on the mapping relationships.The mapping relationships may be expressed by using a mapping table or aformula.

For example, the mapping relationships prestored or preconfigured by theterminal device are listed in the following Table 8:

TABLE 8 Scheduling MCS threshold Element value 2 0 4 1 6 2 8 3 10 4 12 514 6 16 7 18 8

Assuming that the four scheduling MCS thresholds determined by theterminal device are {4, 8, 16, 18}, four elements generated by theterminal device based on the mapping relationships in the foregoingtable are {1, 3, 7, 8}.

In a possible implementation, a value of each of the at least oneelement is ½ of the corresponding scheduling MCS threshold. For example,a value of the first element is ½ of the first scheduling MCS threshold,and a value of the second element is ½ of the second scheduling MCSthreshold.

S1003: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling MCS thresholds in the value set, aquantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S≤₂ ^(b), where S is the quantity of thescheduling MCS thresholds in the value set, and b is the bit quantity.For example, the quantity of the scheduling MCS thresholds in the valueset is 9. According to the foregoing formula, b=4, and the terminaldevice uses 4 bits to represent each element. For example, the fourgenerated elements are 1, 3, 7, and 8, three elements sent by theterminal device are respectively 0001, 0011, and 1000, and a total of 12bits are required. Compared with the prior art in which 5 bits arefixedly used to report each scheduling MCS threshold, in this embodimentof the present disclosure, overheads for reporting the scheduling MCSthresholds by the terminal device are greatly reduced.

S1004: The network device obtains the at least one scheduling MCSthreshold.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling MCS thresholds in the value set andthe elements. The mapping relationships may be expressed by using amapping table or a formula. The network device generates the at leastone scheduling MCS threshold based on the received element and themapping relationships. This process may be an inverse process of S1002.For details, refer to the descriptions of S1002. Details are notdescribed herein again.

In a possible implementation, the network device multiplies the at leastone received element by 2 to generate the at least one scheduling MCSthreshold.

In the method described in FIG. 10, the scheduling MCS thresholddetermined by the terminal device is an even number, and the terminaldevice reports, to the network device, the element associated with thescheduling MCS threshold, thereby reducing a quantity of bits requiredfor reporting by the terminal device, and reducing reporting overheads.

FIG. 11 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1101: A terminal device determines at least one scheduling MCSthreshold.

Specifically, the at least one scheduling MCS threshold includes a firstscheduling MCS threshold and a second scheduling MCS threshold, eachscheduling MCS threshold may be represented by an MCS index value, andthe MCS index value is an integer greater than or equal to 0. The atleast one MCS threshold determined by the terminal device belongs to allpossible scheduling MCS thresholds of the terminal device. For ease ofdescription, in this embodiment, all the possible scheduling MCSthresholds of the terminal device are referred to as a “value set”, anda maximum scheduling MCS threshold in the value set needs to be lessthan or equal to a specified value. For example, in NR, the specifiedvalue may be 31.

Each of the at least one scheduling MCS threshold determined by theterminal device is an odd number, that is, each scheduling MCS thresholdin the value set is an odd number, and the terminal device determines atleast one different scheduling MCS threshold in the value set.

For example, if the specified value is 31, the scheduling MCS thresholdsin the value set are {1, 3, 5, 7, . . . , 27, 29, 31}, and fourscheduling MCS thresholds determined by the terminal device in the valueset are {5, 9, 17, 19}.

In a possible implementation, each scheduling MCS threshold may begreater than a preset value, that is, each scheduling MCS threshold inthe value set is greater than the preset value and is an odd number.

For example, if the specified value is 31, and the preset value is 20,the scheduling MCS thresholds in the value set are {21, 23, 25, 27, 29,31}.

S1102: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one correspondencewith the at least one scheduling MCS threshold, and each element is usedto indicate one scheduling MCS threshold. For example, a first elementin the at least one element indicates a first scheduling MCS thresholdin the at least one scheduling MCS threshold, and a second element inthe at least one element is used to indicate a second scheduling MCSthreshold in the at least one scheduling MCS threshold. All thescheduling MCS thresholds in the value set are numbered, and an elementis a number of a scheduling MCS threshold. A numbering rule for thescheduling MCS thresholds in the value set may be that numbering isperformed in ascending order starting from 1 by using a step of 1, and anumber increases as a scheduling MCS threshold increases; or numberingis performed in ascending order starting from 0, and a number increasesas a scheduling MCS threshold increases; or numbering is performed indescending order starting from a quantity of the scheduling MCSthresholds in the value set by using a step of 1, and a number decreasesas a scheduling MCS threshold increases; or another numbering manner isused. This is not limited in this embodiment. The terminal deviceprestores or preconfigures mapping relationships between all thepossible scheduling MCS thresholds and elements, and the terminal deviceobtains the at least one element based on the mapping relationships. Themapping relationships may be expressed by using a mapping table or aformula.

For example, the mapping relationships prestored or preconfigured by theterminal device are listed in the following Table 9:

TABLE 9 Scheduling MCS threshold Element value 1 0 3 1 5 2 7 3 9 4 11 513 6 15 7 17 8

Assuming that the four scheduling MCS thresholds determined by theterminal device are {3, 7, 15, 17}, four elements generated by theterminal device based on the mapping relationships in the foregoingtable are {1, 3, 7, 8}.

S1103: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling MCS thresholds in the value set, aquantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S≤₂ ^(b), where S is the quantity of thescheduling MCS thresholds in the value set, and b is the bit quantity.For example, the quantity of the scheduling bandwidth thresholds in thevalue set is 9. According to the foregoing formula, b=4, and theterminal device uses 4 bits to represent each element. For example, ifthe four generated elements are 1, 3, 7, and 8, four elements sent bythe terminal device are respectively 0001, 0011, 0111, and 1000, and atotal of 16 bits are required. Compared with the prior art in which 5bits are fixedly used to report each scheduling MCS threshold, in thisembodiment of the present disclosure, overheads for reporting thescheduling MCS thresholds by the terminal device are greatly reduced.

S1104: The network device obtains the at least one scheduling MCSthreshold.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling MCS thresholds in the value set andthe elements. The mapping relationships may be expressed by using amapping table or a formula. The network device generates the at leastone scheduling MCS threshold based on the received element and themapping relationships. This process may be an inverse process of S1002.For details, refer to the descriptions of S1002. Details are notdescribed herein again.

In the method described in FIG. 11, the scheduling MCS thresholddetermined by the terminal device is an odd number, and the terminaldevice reports, to the network device, the element associated with thescheduling MCS threshold, thereby reducing a quantity of bits requiredfor reporting by the terminal device, and reducing reporting overheads.

FIG. 12 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1201: A terminal device determines at least one scheduling MCSthreshold.

Specifically, the at least one scheduling MCS threshold includes a firstscheduling MCS threshold and a second scheduling MCS threshold, eachscheduling MCS threshold may be represented by an MCS index value, andthe MCS index value is an integer greater than or equal to 0. The atleast one MCS threshold determined by the terminal device belongs to allpossible scheduling MCS thresholds of the terminal device. For ease ofdescription, in this embodiment, all the possible scheduling MCSthresholds of the terminal device are referred to as a “value set”, anda maximum scheduling MCS threshold in the value set needs to be lessthan or equal to a specified value. For example, in NR, the specifiedvalue is 31.

Each of the at least one scheduling MCS threshold determined by theterminal device is greater than a preset value, that is, each schedulingMCS threshold in the value set is an even number, and the terminaldevice determines at least one different scheduling MCS threshold in thevalue set.

For example, if the specified value is 31, and the preset value is 23,the scheduling MCS thresholds in the value set are {24, 25, 26, 27, 28,29, 30, 31}, and four scheduling MCS thresholds determined by theterminal device in the value set are {24, 25, 28, 30}.

In a possible implementation, each scheduling MCS threshold is an oddnumber.

In a possible implementation, each MCS threshold is an even number.

S1202: The terminal device obtains at least one element.

Specifically, the at least one element is in a one-to-one correspondencewith the at least one scheduling MCS threshold, and each element is usedto indicate one scheduling MCS threshold. For example, a first elementin the at least one element indicates a first scheduling MCS thresholdin the at least one scheduling MCS threshold, and a second element inthe at least one element is used to indicate a second scheduling MCSthreshold in the at least one scheduling MCS threshold. All thescheduling MCS thresholds in the value set are numbered, and an elementis a number of a scheduling MCS threshold. A numbering rule for thescheduling MCS thresholds in the value set may be that numbering isperformed in ascending order starting from 1 by using a step of 1, and anumber increases as a scheduling MCS threshold increases; or numberingis performed in ascending order starting from 0, and a number increasesas a scheduling MCS threshold increases; or numbering is performed indescending order starting from a quantity of the scheduling MCSthresholds in the value set by using a step of 1, and a number decreasesas a scheduling MCS threshold increases; or another numbering manner isused. This is not limited in this embodiment. The terminal deviceprestores or preconfigures mapping relationships between all thepossible scheduling MCS thresholds and elements, and the terminal deviceobtains the at least one element based on the mapping relationships. Themapping relationships may be expressed by using a mapping table or aformula.

For example, the mapping relationships prestored or preconfigured by theterminal device are listed in the following Table 10:

TABLE 10 Scheduling MCS threshold Element value 24 0 25 1 26 2 27 3 28 429 5 30 6 31 7

Assuming that the four scheduling MCS thresholds determined by theterminal device are {24, 25, 28, 30}, four elements generated by theterminal device based on the mapping relationships in the foregoingtable are {0, 1, 4, 6}.

S1203: The terminal device sends the at least one element to a networkdevice, and the network device receives the at least one element fromthe terminal device.

Specifically, the terminal device sends the at least one element to thenetwork device by using a bit, and the terminal device determines, basedon the quantity of the scheduling MCS thresholds in the value set, aquantity of bits used to send each element. The bit quantity is aminimum integer of b satisfying S<2b, where S is the quantity of thescheduling MCS thresholds in the value set, and b is the bit quantity.For example, the quantity of the scheduling bandwidth thresholds in thevalue set is 9. According to the foregoing formula, b=4, and theterminal device uses 4 bits to represent each element. For example, ifthe four generated elements are 0, 2, 5, and 7, four elements sent bythe terminal device are respectively 0000, 0010, 0101, and 0111, and atotal of 16 bits are required. Compared with the prior art in which 5bits are fixedly used to report each scheduling MCS threshold, in thisembodiment of the present disclosure, overheads for reporting thescheduling MCS thresholds by the terminal device are greatly reduced.

S1204: The network device obtains the at least one scheduling MCSthreshold.

Specifically, the network device prestores or preconfigures the mappingrelationships between the scheduling MCS thresholds in the value set andthe elements. The mapping relationships may be expressed by using amapping table or a formula. The network device obtains the at least onescheduling MCS threshold based on the received element and the mappingrelationships. This process may be an inverse process of S1202. Fordetails, refer to the descriptions of S1202. Details are not describedherein again.

In the method described in FIG. 12, the scheduling MCS thresholddetermined by the terminal device is greater than the preset value, andthe terminal device reports, to the network device, the elementassociated with the scheduling MCS threshold, thereby reducing aquantity of bits required for reporting by the terminal device, andreducing reporting overheads.

FIG. 13 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1301: A terminal device determines at least one scheduling MCSthreshold associated with an MCS table corresponding to a highestmodulation scheme.

Specifically, in the prior art, when a terminal device supports at leastone MCS table, the terminal device needs to report at least onescheduling MCS threshold for each MCS table based on different MCStables. For example, if the terminal device supports an MCS tablecorresponding to 64QAM and an MCS table corresponding to 256QAM, theterminal device needs to separately report, to a network device, fourscheduling MCS thresholds associated with the MCS table corresponding to64QAM, and four scheduling MCS thresholds associated with the MCS tablecorresponding to 256QAM. In this application, the terminal device onlyneeds to report, to the network device, the at least one scheduling MCSthreshold associated with the MCS table corresponding to the highestmodulation scheme. For example, according to the foregoing example, ifthe highest modulation scheme of the terminal device is 256QAM, and theterminal device reports, to the network device, only at least onescheduling MCS threshold associated with the MCS table corresponding to256QAM, without reporting at least one scheduling MCS thresholdassociated with the MCS table corresponding to 64QAM. In this way, aquantity of groups of reported scheduling MCS thresholds can be reduced,thereby reducing reporting overheads.

In a possible design, the MCS table corresponding to the highestmodulation scheme is associated with three scheduling MCS thresholds. Inthe prior art, one group of scheduling MCS thresholds reported by theterminal device includes four scheduling MCS thresholds: a firstscheduling MCS threshold, a second scheduling MCS threshold, a thirdscheduling MCS threshold, and a fourth scheduling MCS threshold, and thefirst scheduling MCS threshold<the second scheduling MCS threshold<thethird scheduling MCS threshold<the fourth scheduling MCS threshold. Inthis application, a fourth scheduling MCS threshold is a default value,the network device already knows the fourth scheduling MCS threshold,and the terminal device only needs to report a first scheduling MCSthreshold, a second scheduling MCS threshold, and a third scheduling MCSthreshold, so that a quantity of scheduling MCS thresholds in each groupis reduced, thereby further reducing reporting overheads of the terminaldevice. The terminal device further needs to report, to the networkdevice, the highest modulation scheme supported by the terminal device,and the network device may determine the fourth scheduling MCS thresholdbased on the highest modulation scheme supported by the terminal device.

S1302: The network device receives, from the terminal device, the atleast one scheduling MCS threshold associated with the MCS tablecorresponding to the highest modulation scheme.

Specifically, the terminal device may send the at least one schedulingMCS threshold to the network device by using a bit. When the terminaldevice supports at least one MCS table, the terminal device only needsto report at least one scheduling MCS threshold associated with an MCStable corresponding to one highest modulation scheme, without reportingone group of scheduling MCS thresholds for each modulation scheme,thereby greatly reducing reporting overheads.

FIG. 14 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1401: A terminal device determines m scheduling MCS thresholds:ptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m).

Specifically, m is an integer greater than 1, ptrsthMCS₁<ptrsthMCS₂< . .. <ptrsthMCS_(m), each scheduling MCS threshold may be represented by anMCS index value, and the MCS index value is an integer greater than orequal to 0. The m scheduling MCS thresholds determined by the terminaldevice belong to all possible scheduling MCS thresholds of the terminaldevice. For ease of description, in this embodiment, all the possiblescheduling MCS thresholds of the terminal device are referred to as a“value set”, a maximum scheduling MCS threshold in the value set needsto be less than or equal to a specified value, and the specified valueis prestored or preconfigured. For example, in an NR communicationssystem, the specified value is 31.

For example, it is assumed that the value set is {0, 1, 2, . . . , 30,31}, m=4, and a set of four scheduling MCS thresholds determined by theterminal device is {0, 10, 20, 31}.

In a possible design, m=3. In the prior art, one group of scheduling MCSthresholds reported by a terminal device includes four scheduling MCSthresholds: a first scheduling MCS threshold, a second scheduling MCSthreshold, a third scheduling MCS threshold, and a fourth scheduling MCSthreshold, and the first scheduling MCS threshold<the second schedulingMCS threshold<the third scheduling MCS threshold<the fourth schedulingMCS threshold. In this application, a fourth scheduling MCS threshold isa default value, the network device already knows the fourth schedulingMCS threshold, and the terminal device only needs to report a firstscheduling MCS threshold, a second scheduling MCS threshold, and a thirdscheduling MCS threshold, so that a quantity of scheduling MCSthresholds in each group is reduced, thereby further reducing reportingoverheads of the terminal device.

S1402: The terminal device sends ptrsthMCS₁, ptrsthMCS₂−ptrsthMCS₁, . .. , and ptrsthMCS_(m)−ptrsthMCS_(m-1) to the network device.

Specifically, values of m elements reported by the terminal device tothe network device are ptrsthMCS₁, ptrsthMCS₂−ptrsthMCS₁, . . . , andptrsthMCS_(m)−ptrsthMCS_(m-1), and the m elements are in a one-to-onecorrespondence with the m scheduling MCS thresholds. For example,ptrsthMCS₁ in the m elements is used to indicate ptrsthMCS₁ in the mscheduling MCS thresholds, and ptrsthMCS₂−ptrsthMCS₁ in the m elementsis used to indicate ptrsthRB₂ in the m scheduling MCS thresholds. Theterminal device may report the m elements to the network device by usingbits.

The terminal device reports ptrsthMCS₁ by using an existing default bitposition, for example, sends ptrsthMCS₁ by using 5 default bits. For m−1differential values: ptrsthMCS₂−ptrsthMCS₁, . . . , andptrsthMCS_(m)−ptrsthMCS_(m-1), the terminal device determines a maximumvalue T_(max) in the m−1 differential values, the terminal devicedetermines a quantity of bits used to send the m−1 differential values,and the bit quantity b is a minimum integer of b satisfyingT_(max)≤2^(b).

For example, according to the example in S1401, if a set of the fourscheduling MCS thresholds determined by the terminal device is {0, 10,20, 31}, four elements reported by the terminal device are {0, 10, 10,11}. If the differential value is within 16 (b=4), {00000, 1010, 1010,1011} is reported by using bits. Compared with the prior art in which 5bits are fixedly used to report each scheduling MCS threshold, in thisembodiment of the present disclosure, reporting overheads of theterminal device are greatly reduced.

S1403: The network device generates the m scheduling MCS thresholds.

The network device generates the m scheduling MCS thresholds based onthe m elements reported by the terminal device. This step is an inverseprocess of S1402. For a specific process, refer to the descriptions ofS1402. Details are not described herein again.

According to the descriptions of FIG. 14, the terminal device reportsthe scheduling MCS thresholds to the network device in a differentialmanner. In this way, a quantity of bits occupied by the scheduling MCSthresholds can be reduced, and reporting overheads of the terminaldevice can be reduced.

FIG. 15 is a schematic flowchart of a data reporting method according toan embodiment of the present disclosure. In this embodiment of thepresent disclosure, the method includes the following steps.

S1501: A terminal device determines m scheduling MCS thresholds:ptrsthMCS₁, ptrsthMCS₂, . . . , and ptrsthMCS_(m).

Specifically, m is an integer greater than 1, ptrsthMCS₁<ptrsthMCS₂< . .. <ptrsthMCS_(m), each scheduling MCS threshold may be represented by anMCS index value, and the MCS index value is an integer greater than orequal to 0. The m scheduling MCS thresholds determined by the terminaldevice belong to all possible scheduling MCS thresholds of the terminaldevice. For ease of description, in this embodiment, all the possiblescheduling MCS thresholds of the terminal devices are referred to as a“value set”, a maximum scheduling MCS threshold in the value set needsto be less than or equal to a specified value, and the specified valueis prestored or preconfigured. For example, in an NR communicationssystem, the specified value may be 31.

For example, it is assumed that the value set is {0, 1, 2, . . . , 30,31}, m=4, and a set of four scheduling MCS thresholds determined by theterminal device is {15, 20, 25, 31}.

In a possible design, m=3. In the prior art, one group of scheduling MCSthresholds reported by a terminal device includes four scheduling MCSthresholds: a first scheduling MCS threshold, a second scheduling MCSthreshold, a third scheduling MCS threshold, and a fourth scheduling MCSthreshold, and the first scheduling MCS threshold<the second schedulingMCS threshold<the third scheduling MCS threshold<the fourth schedulingMCS threshold. In this application, a fourth scheduling MCS threshold isa default value, the network device already knows the fourth schedulingMCS threshold, and the terminal device only needs to report a firstscheduling MCS threshold, a second scheduling MCS threshold, and a thirdscheduling MCS threshold, so that a quantity of scheduling MCSthresholds in each group is reduced, thereby further reducing reportingoverheads of the terminal device.

S1502: The terminal device sends ptrsthMCS₂−ptrsthMCS₁,ptrsthMCS₃−ptrsthMCS₂, . . . , ptrsthMCS_(m)−ptrsthMCS_(m-1), andptrsthMCS_(m), and a network device receives ptrsthMCS₂−ptrsthMCS₁,ptrsthMCS₃−ptrsthMCS₂, . . . , ptrsthMCS_(n)−ptrsthMCS_(n-1), andptrsthMCS_(n) from the terminal device.

Specifically, values of m elements reported by the terminal device tothe network device are ptrsthMCS₁, ptrsthMCS₂−ptrsthMCS₁, . . . ,ptrsthMCS_(m)−ptrsthMCS_(m-1), and the m elements are in a one-to-onecorrespondence with the m scheduling MCS thresholds. For example,ptrsthMCS₁ in the m elements is used to indicate ptrsthMCS₁ in the mscheduling MCS thresholds, and ptrsthMCS₂−ptrsthMCS₁ in the m elementsis used to indicate ptrsthRB₂ in the m scheduling MCS thresholds. Theterminal device may report the m elements to the network device by usingbits.

The terminal device reports ptrsthMCS_(m) by using an existing defaultbit position, for example, sends ptrsthMCS_(m) by using 5 default bits.For m−1 differential values: ptrsthMCS₂−ptrsthMCS₁, . . . , andptrsthMCS_(m)−ptrsthMCS_(m-1), the terminal device determines a maximumvalue T_(max) in the m−1 differential values, the terminal devicedetermines a quantity of bits used to send the m−1 differential values,and the bit quantity b is a minimum integer of b satisfyingT_(max)≤2^(b).

For example, according to the example in S1401, if a set of the fourscheduling MCS thresholds determined by the terminal device is {15, 20,25, 31}, four elements reported by the terminal device are {5, 5, 6,31}. If the differential value is within a range of 2³ (b=3), {101, 101,110, 11111} is reported by using bits. Compared with the prior art inwhich 5 bits are fixedly used to report each scheduling MCS threshold,in this embodiment of the present disclosure, reporting overheads of theterminal device are greatly reduced.

S1503: The network device generates at least one scheduling MCSthreshold.

Specifically, the network device generates the m scheduling MCSthresholds based on the m elements from the terminal device. This stepis an inverse process of S1502. For a specific process, refer to thedescriptions of S1502. Details are not described herein again.

According to the descriptions of FIG. 15, the terminal device reportsthe scheduling bandwidth thresholds to the network device in adifferential manner. In this way, a quantity of bits occupied by thescheduling bandwidth thresholds can be reduced, and reporting overheadsof the terminal device can be reduced.

It should be noted that, for the embodiments in FIG. 2 to FIG. 15, in apossible implementation, after the terminal device reports a threshold(a scheduling bandwidth threshold or a scheduling MCS threshold), if athreshold configured by the network device for the terminal device byusing higher layer signaling is improper, where such an improperconfiguration includes: the threshold configured by the network deviceis greater than the threshold reported by the terminal device, a defaultPTRS configuration prevails for both the network device and the terminaldevice.

In another possible implementation, after the terminal device reports athreshold (a scheduling bandwidth threshold or a scheduling MCSthreshold), if the network device configures only one group ofthresholds for the terminal by using higher layer signaling, that is,delivers only one group of scheduling MCS thresholds or one group ofscheduling bandwidth thresholds, there are the following cases for aPTRS configuration of the network device and the terminal device: (a) Adefault PTRS configuration prevails for the network device and theterminal device. (b) For a configured threshold, the configuredthreshold prevails, and for a non-configured threshold, a defaultconfiguration prevails. For example, when only a scheduling MCSthreshold is configured, the configured scheduling MCS thresholdprevails for a time domain density, and a default configuration prevailsfor a scheduling bandwidth threshold. For example, when only ascheduling bandwidth threshold is configured, the configured schedulingbandwidth threshold prevails for a frequency domain density, and adefault configuration prevails for a scheduling MCS threshold.

The data reporting method in the embodiments of the present disclosureis described in detail above, and a data reporting apparatus (anapparatus 16 for short below) in an embodiment of the present disclosureis provided below.

In a possible implementation, the apparatus 16 shown in FIG. 16 canimplement a terminal device side in the embodiment shown in FIG. 2. Theapparatus 16 includes a determining unit 1601, a generation unit 1602,and a sending unit 1603. The determining unit 1601 is configured todetermine at least one scheduling bandwidth threshold, where eachscheduling bandwidth threshold is a natural number power of 2.

The generation unit 1602 is configured to obtain at least one elementbased on the at least one scheduling bandwidth threshold, where eachscheduling bandwidth threshold is used to indicate one of the at leastone scheduling bandwidth threshold.

The sending unit 1603 is configured to send the at least one element toa network device.

Optionally, a value of each element is a logarithm of the indicatedscheduling bandwidth threshold to a base 2.

Optionally, a maximum scheduling bandwidth threshold in the at least onescheduling bandwidth threshold is less than or equal to a maximumbandwidth supported by a terminal device.

Optionally, each of the at least one scheduling bandwidth threshold isgreater than a preset value.

This embodiment of the present disclosure and the method embodiment inFIG. 2 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 2. Details are not described herein again.

In another possible implementation, the apparatus 16 shown in FIG. 16can implement a terminal device side in the embodiment shown in FIG. 5.The apparatus 16 includes a determining unit 1601, a generation unit1602, and a sending unit 1603. The determining unit 1601 is configuredto determine at least one scheduling bandwidth threshold, where aminimum scheduling bandwidth threshold in the at least one schedulingbandwidth threshold is greater than a preset value.

The generation unit 1602 is configured to obtain at least one element,where each element is used to indicate one of the at least onescheduling bandwidth threshold. The sending unit 1603 is configured tosend the at least one element to a network device.

Optionally, each scheduling bandwidth threshold is a natural numberpower of 2.

Optionally, each scheduling bandwidth threshold is a product of anatural number power of 2, a natural number power of 3, and a naturalnumber power of 5.

This embodiment of the present disclosure and the method embodiment inFIG. 5 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 5. Details are not described herein again.

In another possible implementation, the apparatus 16 shown in FIG. 16can implement a terminal device side in the embodiment shown in FIG. 4.The apparatus 16 includes a determining unit 1601, a generation unit1602, and a sending unit 1603. The determining unit 1601 is configuredto determine at least one scheduling bandwidth threshold, where eachscheduling bandwidth threshold is a product of a natural number power of2, a natural number power of 3, and a natural number power of 5. Thegeneration unit 1602 is configured to obtain at least one element basedon the at least one scheduling bandwidth threshold, where each elementis used to indicate one of the at least one scheduling bandwidththreshold. The sending unit 1603 is configured to send the at least oneelement to a network device.

Optionally, a waveform used by the terminal device is DFT-S-OFDM.

Optionally, each scheduling bandwidth threshold is less than or equal toa maximum bandwidth supported by a terminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 4 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 4. Details are not described herein again.

In another possible implementation, the apparatus 16 shown in FIG. 16can implement a terminal device side in the embodiment shown in FIG. 10.The apparatus 16 includes a determining unit 1601, a generation unit1602, and a sending unit 1603. The determining unit 1601 is configuredto determine at least one scheduling MCS threshold, where eachscheduling MCS threshold is an even number.

The generation unit 1602 is configured to obtain at least one element,where each element is used to indicate one of the at least onescheduling MCS threshold.

The sending unit 1603 is configured to send the at least one element toa network device.

In a possible design, each scheduling MCS threshold is greater than apreset value.

This embodiment of the present disclosure and the method embodiment inFIG. 10 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 10. Details are not described herein again.

In another possible implementation, the apparatus 16 shown in FIG. 16can implement a terminal device side in the embodiment shown in FIG. 11.The apparatus 16 includes a determining unit 1601, a generation unit1602, and a sending unit 1603. The determining unit 1601 is configuredto determine at least one scheduling MCS threshold, where eachscheduling MCS threshold is an odd number.

The generation unit 1602 is configured to obtain at least one element,where each element is used to indicate one of the at least onescheduling MCS threshold.

The sending unit 1603 is configured to send the at least one element toa network device.

Optionally, each scheduling MCS threshold is greater than a presetvalue.

This embodiment of the present disclosure and the method embodiment inFIG. 11 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 11. Details are not described herein again.

The apparatus 16 may be a terminal device, or the apparatus 16 may be afield-programmable gate array (field-programmable gate array, FPGA), adedicated integrated circuit, a system on chip (system on chip, SoC), acentral processing unit (central processing unit, CPU), a networkprocessor (network processor, NP), a digital signal processing circuit,or a micro controller unit (micro controller unit, MCU) for implementinga related function, or may be a programmable controller (programmablelogic device, PLD) or another integrated circuit.

The data reporting method in the embodiments of the present disclosureis described in detail above, and a data receiving apparatus (anapparatus 17 for short below) in an embodiment of the present disclosureis provided below.

In a possible implementation, the apparatus 17 shown in FIG. 17 canimplement a network device side in the embodiment shown in FIG. 2. Theapparatus 17 includes a receiving unit 1701 and a generation unit 1702.

The receiving unit 1701 is configured to receive at least one elementfrom a terminal device, where each element is used to indicate onescheduling bandwidth threshold.

The generation unit 1702 is configured to obtain at least one schedulingbandwidth threshold based on the at least one element, where eachscheduling bandwidth threshold is a natural number power of 2.

Optionally, each scheduling bandwidth threshold is equal to a k^(th)power of 2, where k is a value of a corresponding element.

This embodiment of the present disclosure and the method embodiment inFIG. 2 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 2. Details are not described herein again.

In another possible implementation, the apparatus 17 shown in FIG. 17can implement a network device side in the embodiment shown in FIG. 4.The apparatus 17 includes a receiving unit 1701 and a generation unit1702. The receiving unit 1701 is configured to receive at least oneelement from a terminal device, where each element is used to indicateone scheduling bandwidth threshold.

The generation unit 1702 is configured to obtain at least one schedulingbandwidth threshold based on the at least one element, where eachscheduling bandwidth threshold is a product of a natural number power of2, a natural number power of 3, and a natural number power of 5.

In a possible design, a waveform used by the terminal device is aDFT-S-OFDM waveform.

This embodiment of the present disclosure and the method embodiment inFIG. 4 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 4. Details are not described herein again.

In another possible implementation, it should be noted that, theapparatus 17 shown in FIG. 17 can implement a network device side in theembodiment shown in FIG. 7. The apparatus 17 includes a receiving unit1701 and a generation unit 1702. The receiving unit 1701 is configuredto receive, from a terminal device, at least one scheduling bandwidththreshold associated with a first subcarrier spacing.

The generation unit 1702 is configured to determine, based on a ratiorelationship between the first subcarrier spacing and a secondsubcarrier spacing, at least one scheduling bandwidth thresholdassociated with the second subcarrier spacing.

Optionally, the first subcarrier spacing is associated with twoscheduling bandwidth thresholds, and each scheduling bandwidth thresholdis less than or equal to a maximum bandwidth supported by the terminaldevice.

This embodiment of the present disclosure and the method embodiment inFIG. 7 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 7. Details are not described herein again.

In another possible implementation, it should be noted that, theapparatus 17 shown in FIG. 17 can implement a network device side in theembodiment shown in FIG. 8. The apparatus 17 includes a receiving unit1701 and a generation unit 1702. The receiving unit 1701 is configuredto receive n elements from a terminal device, where n is an integergreater than 1, and values of the n elements are C₁, C₂, . . . , andC_(n).

The generation unit 1702 is configured to generate n schedulingbandwidth thresholds based on the n elements, where the n schedulingbandwidth thresholds are C₁, C₁+C₂, . . . , and C₁+C₂+ . . . +C₂.

Optionally, n is equal to 2, and ptrsthRB₁ and ptrsthRB₂ each are lessthan or equal to a maximum bandwidth supported by the terminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 8 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 8. Details are not described herein again.

In another possible implementation, the apparatus 17 shown in FIG. 17can implement a network device side in the embodiment shown in FIG. 9.The apparatus 17 includes a receiving unit 1701 and a generation unit1702. The receiving unit 1701 is configured to receive n elements from aterminal device, where n is an integer greater than 1, and values of then elements are C₁, C₂, . . . , and C_(n).

The generation unit 1702 is configured to generate, by a network device,n scheduling bandwidth thresholds based on the n elements, where the nscheduling bandwidth thresholds are C_(n)−C_(n-1)−, . . . , −C₂−C₁,C_(n)−C_(n-1)−, . . . , −C₂, . . . , C_(n)−C_(n-1), and C_(n).

This embodiment of the present disclosure and the method embodiment inFIG. 9 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 9. Details are not described herein again.

In another possible implementation, it should be noted that, theapparatus 17 shown in FIG. 17 can implement a network device side in theembodiment shown in FIG. 14. The apparatus 17 includes a receiving unit1701 and a generation unit 1702. The receiving unit 1701 is configuredto receive m elements sent by a terminal device, where values of the melements are D₁, D₂, . . . , and D_(m).

The generation unit 1702 is configured to generate m scheduling MCSthresholds, where the m MCS thresholds are D₁, D₁+D₂, . . . , and D₁+D₂+. . . +D_(m-1)+D_(m).

This embodiment of the present disclosure and the method embodiment inFIG. 14 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 14. Details are not described herein again.

In another possible implementation, the data reporting method in theembodiments of the present disclosure is described in detail above inFIG. 15, and a data receiving apparatus (an apparatus 17 for shortbelow) in an embodiment of the present disclosure is provided below.

It should be noted that, the apparatus 17 shown in FIG. 17 can implementa network device side in the embodiment shown in FIG. 15. The apparatus17 includes a receiving unit 1701 and a generation unit 1702. Thereceiving unit 1701 is configured to receive m elements from a terminaldevice, where values of the m elements are D₁, D₂, . . . , and D_(m).

The generation unit 1702 is configured to generate m scheduling MCSthresholds, where the m scheduling MCS thresholds are D_(m)−D_(m-1)− . .. −D₂−D₁, D_(m)−D_(m-1)− . . . −D₂, . . . D_(m)−D_(m-1), and D_(m).

This embodiment of the present disclosure and the method embodiment inFIG. 15 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 15. Details are not described herein again.

The data reporting method in the embodiments of the present disclosureis described in detail above, and a data reporting apparatus (anapparatus 18 for short below) in an embodiment of the present disclosureis provided below.

It should be noted that, the apparatus 18 shown in FIG. 18 can implementa terminal device side in the embodiment shown in FIG. 5. The apparatus18 includes a determining unit 1801 and a sending unit 1802. Thedetermining unit 1801 is configured to determine at least one schedulingbandwidth threshold, where a maximum scheduling bandwidth threshold inthe at least one scheduling bandwidth threshold is less than or equal toa maximum bandwidth supported by a terminal device. The sending unit1802 is configured to send the at least one scheduling bandwidththreshold to a network device.

This embodiment of the present disclosure and the method embodiment inFIG. 5 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 5. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 6. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine two schedulingbandwidth thresholds, where a larger one of the two scheduling bandwidththresholds is less than a maximum bandwidth supported by a terminaldevice.

The sending unit 1802 is configured to send the two scheduling bandwidththresholds to a network device.

Optionally, a waveform used by the terminal device is DFT-S-OFDM.

Optionally, each scheduling bandwidth threshold is less than or equal tothe maximum bandwidth supported by the terminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 6 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 6. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 7. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine at least onescheduling bandwidth threshold associated with a first subcarrierspacing. The sending unit 1802 is configured to send the at least onescheduling bandwidth threshold associated with the first subcarrierspacing to a network device.

In a possible design, the first subcarrier spacing is associated withtwo scheduling bandwidth thresholds, and each scheduling bandwidththreshold is less than or equal to a maximum bandwidth supported by aterminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 7 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 7. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 8. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine n schedulingbandwidth thresholds, where the n scheduling bandwidth thresholds areptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n), ptrsthRB₁<ptrsthRB₂< . .. <ptrsthRB_(n), and n is an integer greater than 1.

The sending unit 1802 is configured to send ptrsthRB₁,ptrsthRB₂−ptrsthRB₁, . . . , and ptrsthRB_(n)−ptrsthRB_(n-1) to anetwork device.

Optionally, n is equal to 2, and ptrsthRB₁ and ptrsthRB₂ each are lessthan or equal to a maximum bandwidth supported by a terminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 8 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 8. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 9. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine n schedulingbandwidth thresholds, where the n scheduling bandwidth thresholds areptrsthRB₁, ptrsthRB₂, . . . , and ptrsthRB_(n), n is an integer greaterthan 1, and ptrsthRB₁<ptrsthRB₂< . . . <ptrsthRB_(n).

The sending unit 1802 is configured to send ptrsthRB₂−ptrsthRB₁,ptrsthRB₃−ptrsthRB₂, . . . , ptrsthRB_(n)−ptrsthRB_(n-1), andptrsthRB_(n) to a network device.

Optionally, n is equal to 2, and ptrsthRB₁ and ptrsthRB₂ each are lessthan or equal to a maximum bandwidth supported by a terminal device.

This embodiment of the present disclosure and the method embodiment inFIG. 9 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 9. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 13. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine at least onescheduling MCS threshold associated with a highest modulation scheme.

The sending unit 1802 is configured to send, to a network device, the atleast one scheduling MCS threshold associated with the highestmodulation scheme.

Optionally, the at least one scheduling MCS threshold includes threescheduling MCS thresholds, and a maximum scheduling MCS threshold in thethree scheduling MCS thresholds is less than 1 plus a maximum MCS indexvalue corresponding to the highest modulation scheme.

This embodiment of the present disclosure and the method embodiment inFIG. 13 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 13. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 14. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine m scheduling MCSthresholds, where the m scheduling MCS thresholds are ptrsthMCS₁,ptrsthMCS₂, . . . , and ptrsthMCS_(m), m is an integer greater than 1,and ptrsthMCS₁<ptrsthMCS₂, . . . , <ptrsthMCS_(m).

The sending unit 1802 is configured to send ptrsthMCS₁,ptrsthMCS₂−ptrsthMCS₁, . . . , and ptrsthMCS_(m)−ptrsthMCS_(m-1) to anetwork device.

This embodiment of the present disclosure and the method embodiment inFIG. 14 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 14. Details are not described herein again.

In a possible implementation, the apparatus 18 shown in FIG. 18 canimplement a terminal device side in the embodiment shown in FIG. 15. Theapparatus 18 includes a determining unit 1801 and a sending unit 1802.The determining unit 1801 is configured to determine m scheduling MCSthresholds, where at least one scheduling MCS threshold is ptrsthMCS₁,

, . . . , and ptrsthMCS_(m), m is an integer greater than 1, andptrsthMCS₁<ptrsthMCS₂, . . . , <ptrsthMCS_(m).

The sending unit 1802 is configured to send ptrsthMCS₂−ptrsthMCS₁,ptrsthMCS₃−ptrsthMCS₂, . . . , ptrsthMCS_(m)−ptrsthMCS_(m-1), andptrsthMCS_(m) to a network device.

This embodiment of the present disclosure and the method embodiment inFIG. 15 are based on a similar idea, and technical effects thereof arealso similar. For a specific process, refer to the descriptions of themethod embodiment in FIG. 15. Details are not described herein again.

The apparatus 18 may be a terminal device, or the apparatus 18 may be afield-programmable gate array (field-programmable gate array, FPGA), adedicated integrated circuit, a system on chip (system on chip, SoC), acentral processing unit (central processor unit, CPU), a networkprocessor (network processor, NP), a digital signal processing circuit,or a micro controller unit (micro controller unit, MCU) for implementinga related function, or may be a programmable controller (programmablelogic device, PLD) or another integrated circuit.

FIG. 19 is a schematic structural diagram of an apparatus according toan embodiment of the present disclosure. The apparatus is brieflyreferred to as an apparatus 19. The apparatus 19 may be integrated intothe foregoing network device or terminal device. As shown in FIG. 19,the apparatus includes a memory 1902, a processor 1901, a transmitter1904, and a receiver 1903.

The memory 1902 may be an independent physical unit, and is connected tothe processor 1901, the transmitter 1904, and the receiver 1903 by usinga bus. The memory 1902, the processor 1901, the transmitter 1904, andthe receiver 1903 may be integrated together, implemented throughhardware, and the like.

The transmitter 1904 and the receiver 1903 may be further connected toan antenna. The receiver 1903 receives, through the antenna, informationsent by another device, and correspondingly, the transmitter 1904 sendsinformation to another device through the antenna.

The memory 1902 is configured to store a program for implementing theforegoing method embodiment or the modules in the foregoing apparatusembodiment. The processor 1901 invokes the program, to perform anoperation in the foregoing method embodiment.

Optionally, when some or all of the steps in the in the foregoingembodiment are implemented through software, the apparatus mayalternatively include only the processor. The memory configured to storea program is located outside the apparatus, and the processor isconnected to the memory through a circuit/wire, and is configured toread and execute the program stored in the memory.

The processor may be a central processing unit (central processing unit,CPU), a network processor (network processor, NP), or a combination of aCPU and an NP.

The processor may further include a hardware chip. The hardware chip maybe an application-specific integrated circuit (application-specificintegrated circuit, ASIC), a programmable logic device (programmablelogic device, PLD), or a combination thereof. The PLD may be a complexprogrammable logic device (complex programmable logic device, CPLD), afield-programmable gate array (field-programmable gate array, FPGA),generic array logic (generic array logic, GAL), or any combinationthereof.

The memory may include a volatile memory (volatile memory), for example,a random access memory (random-access memory, RAM); or the memory mayinclude a non-volatile memory (non-volatile memory), for example, aflash memory (flash memory), a hard disk drive (hard disk drive, HDD),or a solid-state drive (solid-state drive, SSD); or the memory mayinclude a combination of the foregoing types of memories.

In the foregoing embodiment, a sending module or a transmitter performssending steps in the foregoing method embodiments, a receiving module ora receiver performs receiving steps in the foregoing method embodiments,and other steps are performed by other modules or processors. Thesending module and the receiving module can form a transceiver module,and the receiver and the transmitter can form a transceiver.

An embodiment of this application further provides a computer storagemedium, storing a computer program. The computer program is used toperform the random access method in the foregoing embodiment.

An embodiment of this application further provides a computer programproduct including an instruction. When the computer program product isrun on a computer, the computer is enabled to perform the random accessmethod in the foregoing embodiment.

A person skilled in the art should understand that the embodiments ofthis application may be provided as a method, a system, or a computerprogram product. Therefore, this application may use a form of hardwareonly embodiments, software only embodiments, or embodiments with acombination of software and hardware. Moreover, this application may usea form of a computer program product that is implemented on one or morecomputer-usable storage media (including but not limited to a diskmemory, a CD-ROM, an optical memory, and the like) that include computerusable program code.

This application is described with reference to the flowcharts and/orblock diagrams of the method, the device (system), and the computerprogram product according to the embodiments of this application. Itshould be understood that computer program instructions may be used toimplement each process and/or each block in the flowcharts and/or theblock diagrams and a combination of a process and/or a block in theflowcharts and/or the block diagrams. These computer programinstructions may be provided for a general-purpose computer, aspecial-purpose computer, an embedded processor, or a processor of anyother programmable data processing device to generate a machine, so thatthe instructions executed by a computer or a processor of any otherprogrammable data processing device generate an apparatus forimplementing a specific function in one or more processes in theflowcharts and/or in one or more blocks in the block diagrams.

These computer program instructions may be stored in a computer-readablememory that can instruct a computer or any other programmable dataprocessing device to work in a specific manner, so that the instructionsstored in the computer-readable memory generate an artifact thatincludes an instruction apparatus. The instruction apparatus implementsa specific function in one or more processes in the flowcharts and/or inone or more blocks in the block diagrams.

These computer program instructions may be loaded onto a computer oranother programmable data processing device, so that a series ofoperations and steps are performed on the computer or the anotherprogrammable device, thereby generating computer-implemented processing.Therefore, the instructions executed on the computer or the anotherprogrammable device provide steps for implementing a specific functionin one or more processes in the flowcharts and/or in one or more blocksin the block diagrams.

What is claimed is:
 1. A data reporting method, comprising: determining,by a terminal device, at least a first, second, and third schedulingmodulation and coding scheme (MCS) threshold associated with an MCStable, wherein the MCS table corresponds to the highest modulationschemes supported by the terminal device, the MCS table is furtherassociated with a fourth scheduling MCS threshold, and the fourthscheduling MCS threshold is a default value; and sending, by theterminal device to a network device, the first scheduling MCS threshold,the second scheduling MCS threshold, and the third scheduling MCSthreshold.
 2. The method according to claim 1, wherein a maximumscheduling MCS threshold in the first, second, and third scheduling MCSthreshold is less than or equal to 1 plus a maximum MCS index valuedirectly corresponding to a code rate in the MCS table.
 3. The methodaccording to claim 1, wherein the first scheduling MCS threshold is lessthan the second scheduling MCS threshold is less than the thirdscheduling MCS threshold is less than the default scheduling MCSthreshold.
 4. The method according to claim 1, wherein the methodcomprising: sending, by the terminal device to the network device, thehighest modulation scheme supported by the terminal device, wherein thefourth scheduling MCS threshold is determined based on the highestscheduling MCS threshold supported by the terminal device.
 5. The methodaccording to claim 4, wherein the highest scheduling MCS thresholdsupported by the terminal device is 64 QAM or 256 QAM.
 6. A datareporting method, comprising: receiving, by a network device from aterminal device, a first scheduling modulation and coding scheme MCSthreshold, a second scheduling MCS threshold, and a third scheduling MCSthreshold which are associated with an MCS table corresponding to ahighest modulation scheme; wherein the MCS table is further associatedwith a fourth scheduling MCS threshold, and the fourth scheduling MCSthreshold is a default value.
 7. The method according to claim 6,wherein a maximum scheduling MCS threshold in the first scheduling MCSthreshold, the second scheduling MCS threshold, and the third schedulingMCS threshold is less than or equal to 1 plus a maximum MCS index valuedirectly corresponding to a code rate in the MCS table.
 8. The methodaccording to claim 6, wherein the first scheduling MCS threshold is lessthan the second scheduling MCS threshold is less than the thirdscheduling MCS threshold is less than the fourth scheduling MCSthreshold.
 9. The method according to claim 6, wherein the methodcomprising: receiving, by the network device from a terminal device, thehighest modulation scheme supported by the terminal device, wherein thefourth scheduling MCS threshold is determined based on the highestscheduling MCS threshold supported by the terminal device.
 10. Themethod according to claim 9, wherein the highest scheduling MCSthreshold supported by the terminal device is 64 QAM or 256 QAM.
 11. Anapparatus, wherein the apparatus comprises a processor and a memory, thememory stores a program, and the processor is configured to execute theprogram to cause the apparatus to: determine a first schedulingmodulation and coding scheme MCS threshold, a second scheduling MCSthreshold, and a third scheduling MCS threshold which are associatedwith an MCS table corresponding to a highest modulation scheme supportedby the apparatus; wherein the MCS table is further associated with afourth scheduling MCS threshold, and the fourth scheduling MCS thresholdis a default value; and send, to a network device, the first schedulingMCS threshold, the second scheduling MCS threshold, and the thirdscheduling MCS threshold.
 12. The apparatus according to claim 11,wherein a maximum scheduling MCS threshold in the first scheduling MCSthreshold, the second scheduling MCS threshold, and the third schedulingMCS threshold is less than or equal to 1 plus a maximum MCS index valuedirectly corresponding to a code rate in the MCS table.
 13. Theapparatus according to claim 11, wherein the first scheduling MCSthreshold is less than the second scheduling MCS threshold is less thanthe third scheduling MCS threshold is less than the fourth schedulingMCS threshold.
 14. The apparatus according to claim 11, wherein theprocessor is configured to execute the program to cause the apparatusto: send, to the network device, the highest modulation scheme supportedby the apparatus, wherein the fourth scheduling MCS threshold isdetermined based on the highest scheduling MCS threshold supported bythe apparatus.
 15. The apparatus according to claim 14, wherein thehighest scheduling MCS threshold supported by the terminal device is 64QAM or 256 QAM.
 16. An apparatus, wherein the apparatus comprises aprocessor and a memory, the memory stores a program, and the processoris configured to execute the program to cause the apparatus to: receive,from a terminal device, a first scheduling modulation and coding schemeMCS threshold, a second scheduling MCS threshold, and a third schedulingMCS threshold which are associated with an MCS table corresponding to ahighest modulation scheme; wherein the MCS table is further associatedwith a fourth scheduling MCS threshold, and the fourth scheduling MCSthreshold is a default value.
 17. The apparatus according to claim 16,wherein a maximum scheduling MCS threshold in the first scheduling MCSthreshold, the second scheduling MCS threshold, and the third schedulingMCS threshold is less than or equal to 1 plus a maximum MCS index valuedirectly corresponding to a code rate in the MCS table.
 18. Theapparatus according to claim 16, wherein the first scheduling MCSthreshold is less than the second scheduling MCS threshold is less thanthe third scheduling MCS threshold is less than the fourth schedulingMCS threshold.
 19. The apparatus according to claim 16, wherein theprocessor is configured to execute the program to cause the apparatusto: receive, from a terminal device, the highest modulation schemesupported by the terminal device, wherein the fourth scheduling MCSthreshold is determined based on the highest scheduling MCS thresholdsupported by the terminal device.
 20. The apparatus according to 19,wherein the highest scheduling MCS threshold supported by the terminaldevice is 64 QAM or 256 QAM.